Business Data Communications and Networking, 14th Edition By Jerry FitzGerald Test Bank

Type:

Test Bank

Business Data Resource: Communications and Networking Edition:

14th Edition

Author(s):

Jerry FitzGerald Alan Dennis Alexandra Durcikova

Chapter 1 Introduction to Data Communications True/False Questions The following are possible True/False questions for tests. The statement is given and the answer is provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be aware of the applications of data communications networks

2. It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Be aware of the three fundamental questions this book answers

3. The most frequently used database in organizations is Microsoft Access.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Be aware of the three fundamental questions this book answers

4. Telecommunications is the transmission of voice and video as well as data and usually implies transmitting a longer distance than in a data communication network.

Answer: Difficulty: Reference: L.O.:

True Medium Data Communications Networks Be familiar with the major components of and types of networks

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5. A local area network (LAN) connects other LANs and backbone networks (BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

Answer: Difficulty: Reference: L.O.:

False Medium Data Communications Networks Be familiar with the major components of and types of networks

6. An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.

Answer: Difficulty: Reference: L.O.:

False Medium Data Communications Networks Be familiar with the major components of and types of networks

7. A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet. This is an example of an extranet.

Answer: Difficulty: Reference: L.O.:

True Medium Data Communications Networks Be familiar with the major components of and types of networks

8. There are four computers that make networks what they are.

Answer: Difficulty: Reference: L.O.:

False Easy Data Communications Networks Be familiar with the major components of and types of networks

9. About half of all routers run Cisco IOS (Inter-operating system) that was specifically created for routers.

Answer: Difficulty: Reference: L.O.:

False Easy Data Communications Networks Be familiar with the major components of and types of networks

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10. The OSI model is currently the most widely implemented network model used to develop and build networks of any size, including the Internet itself.

Answer: Difficulty: Reference: L.O.:

False Medium Network Models Understand the role of network layers

11. The data link layer has a global responsibility.

Answer: Difficulty: Reference: L.O.:

False Medium Network Models Understand the role of network layers

12. The transport layer has a local responsibility.

Answer: Difficulty: Reference: L.O.:

False Medium Network Models Understand the role of network layers

13. The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.

Answer: Difficulty: Reference: L.O.:

True Easy Network Models Understand the role of network layers

14. In the OSI model, the application layer provides a set of utilities for applications and is the end user’s access to the network.

Answer: Difficulty: Reference: L.O.:

True Medium Network Models Understand the role of network layers

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15. The application layer is the seventh layer of the Internet model and specifies the type of connection and the electrical signals that pass through it.

Answer: Difficulty: Reference: L.O.:

False Easy Network Models Understand the role of network layers

16. At the transport layer in the Internet model, TCP is responsible for breaking large files received from the application layer into smaller messages and opening a connection to a server for transferring them.

Answer: Difficulty: Reference: L.O.:

True Hard Network Models Understand the role of network layers

17. Ethernet is an example of a network layer protocol.

Answer: Difficulty: Reference: L.O.:

False Easy Network Standards Be familiar with the role of network standards

18. Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.

Answer: Difficulty: Reference: L.O.:

True Easy Network Standards Be familiar with the role of network standards

19. The specification stage of the de jure standardization process consists of developing nomenclature and identifying the problems to be addressed.

Answer: Difficulty: Reference: L.O.:

True Medium Network Standards Be familiar with the role of network standards

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20. ANSI is a voting participant in the ISO. Answer: Difficulty: Reference: L.O.:

True Easy Network Standards Be familiar with the role of network standards

21. IoT technologies are restricted to consumer use.

Answer: Difficulty: Reference: L.O.:

False Easy Future Trends Be aware of three key trends in communications and networking.

22. All IoT technologies are connected to the Internet by WIFI. Answer: Difficulty: Reference: L.O.:

False Easy Future Trends Be aware of three key trends in communications and networking.

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Multiple Choice The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. Data communications and networking can be considered as a global area of study because: a. new technologies and applications emerge from a variety of countries and spread around the world b. the technologies enable global communication c. the political and regulatory issues are exactly the same in every country d. a and b e. none of the above Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the major components of and types of networks

2. The _____ Industrial Revolution is currently underway. a. b. c. d. e.

first second third fourth fifth

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the major components of and types of networks

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3. IT has four core capabilities within organizational settings. Which of the following is not one of these? a. b. c. d. e.

Verifying data Storing and retrieving data Protecting data Automating data operations Analyzing and visualizing data

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with the major components of and types of networks

4. Which of the following is not true about a server? a. stores data and software that can be accessed by the client. b. may be a personal computer or a mainframe on the network. c. in client/server computing they work together over the network with client computers to support the business application. d. can only perform one function on a network. e. stores documents and graphics that can be accessed from any Web browser.

Answer: Difficulty: Reference: L.O.:

d Hard Data Communications Networks Be familiar with the major components of and types of networks

5. Networks that are designed to connect similar computers that share data and software with each other are called: a. b. c. d. e.

client/server networks peer-to-peer networks host networks client networks local area networks

Answer: Difficulty: Reference: L.O.:

b Easy Data Communications Networks Be familiar with the major components of and types of networks

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6. The function of the file server is to : a. b. c. d. e.

store data and software programs that can be used by client computers on the network. manage all printing requests from clients on the network. transfer e-mail messages to other servers on the network. store HTML documents for an Internet or intranet web site. coordinate the communication of client and servers on the network.

Answer: Difficulty: Reference: L.O.:

a Medium Data Communications Networks Be familiar with the major components of and types of networks

7. A local area network is: a. a large central network that connects other networks in a distance spanning exactly 5 miles. b. a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information such as a set of rooms, a single building, or a set of well-connected buildings. c. a network spanning a geographical area that usually encompasses a city or county area (3 to 30 miles). d. a network spanning a large geographical area (up to 1000s of miles). e. a network spanning exactly 10 miles with common carrier circuits.

Answer: Difficulty: Reference: L.O.:

b Easy Data Communications Networks Be familiar with the major components of and types of networks

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8. A backbone network is: a. a high speed central network that connects other networks in a distance spanning up to several miles. b. a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange information. c. a network spanning a geographical area that usually encompasses a city or county area (3 to 30 miles). d. a network spanning a large geographical area (up to 1000s of miles). e. a network spanning exactly 200 miles with common carrier circuits.

Answer: Difficulty: Reference: L.O.:

a Medium Data Communications Networks Be familiar with the major components of and types of networks

9. Which of the following is not a property of a WAN: a. b. c. d.

connects backbone networks and MANS. spans hundreds or thousands of miles provides data transmission speeds from 56Kbps to 10Gbps. connects a group of computers in a small geographic area such as room, floor, building or campus. e. uses leased lines from IXCs like ATT, MCI, and Sprint.

Answer: Difficulty: Reference: L.O.:

d Medium Data Communications Networks Be familiar with the major components of and types of networks

10. A(n) _________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization. a. b. c. d. e.

WAN BN extranet intranet MAN

Answer: Difficulty: Reference: L.O.:

d Easy Data Communications Networks Be familiar with the major components of and types of networks

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11. A(n) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet. a. b. c. d. e.

WAN BN extranet intranet MAN

Answer: Difficulty: Reference: L.O.:

c Easy Data Communications Networks Be familiar with the major components of and types of networks

12. A/n _____ is a group of computers located in the same general area. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

a Easy Data Communications Networks Be familiar with the major components of and types of networks

13. A/n _____ is a large, central network connecting several LANs, BNs, MANs, and WANs. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

b Easy Data Communications Networks Be familiar with the major components of and types of networks

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14. A/n _____ connect BNs and MANs. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

c Easy Data Communications Networks Be familiar with the major components of and types of networks

15. A/n _____ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

d Easy Data Communications Networks Be familiar with the major components of and types of networks

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16. A/n _____ uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

e Easy Data Communications Networks Be familiar with the major components of and types of networks

17. Your college provides a special high-speed network for students that can only be accessed on campus. This is a _____. a. b. c. d. e.

local area network backbone network wide area network intranet extranet

Answer: Difficulty: Reference: L.O.:

d Easy Data Communications Networks Be familiar with the major components of and types of networks

18. Which layer of the OSI model is responsible for ensuring that all packets sent are received by the destination station by dealing with end-to-end issues? a. b. c. d. e.

presentation transport physical session application

Answer: Difficulty: Reference: L.O.:

b Easy Networking Models Understand the role of network layers

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19. Which layer of the OSI model is responsible for ensuring flow control so that the destination station does not receive more packets that it can process at any given time? a. b. c. d. e.

presentation transport physical session application

Answer: Difficulty: Reference: L.O.:

b Easy Networking Models Understand the role of network layers

20. The ____________ layer of the OSI model is responsible for data format translation. a. b. c. d. e.

session presentation physical application transport

Answer: Difficulty: Reference: L.O.:

b Easy Networking Models Understand the role of network layers

21. In the Internet model, the application layer corresponds to the ________ layer(s) of the OSI model. a. b. c. d. e.

data link and network session, presentation and application application layer application and presentation network, transport and presentation

Answer: Difficulty: Reference: L.O.:

b Hard Networking Models Understand the role of network layers

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22. The fourth layer of the OSI model is called the __________ layer. a. b. c. d. e.

network transport session data link presentation

Answer: Difficulty: Reference: L.O.:

b Easy Networking Models Understand the role of network layers

23. ___________ is an orderly close to a dialogue between end users. a. b. c. d. e.

Session termination Physical bits Frame overhead Packet encapsulation Message encryption

Answer: Difficulty: Reference: L.O.:

a Hard Networking Models Understand the role of network layers

24. The _________ layer performs error checking which is redundant to some extent with the function of the _________ layer. a. b. c. d. e.

application, presentation physical, data link transport, data link presentation, transport network, physical

Answer: Difficulty: Reference: L.O.:

c Medium Networking Models Understand the role of network layers

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25. Which is not a function of the physical layer: a. b. c. d. e.

transmission of bits. defining the rules by which one and zeroes are transmitted. providing error-free transmission of data. providing the physical connection between sender and receiver. specifying the type of connection and type of signals, waves or pulses that pass through it.

Answer: Difficulty: Reference: L.O.:

c Hard Networking Models Understand the role of network layers

26. The _________ layer is responsible for routing of messages from the sender to the final destination. a. b. c. d. e.

data communication layer resident layer application layer network layer physical layer

Answer: Difficulty: Reference: L.O.:

d Easy Networking Models Understand the role of network layers

27. Which of the following is not a function of the data link layer? a. deciding when to transmit messages over the media b. formatting the message by indicating where messages start and end, and which part is the address c. detecting and correcting any errors that have occurred in the transmission of the message d. specifying the type of connection, and the electrical signals, radio waves, or light pulses that pass through it e. controlling the physical layer by determining when to transmit Answer: Difficulty: Reference: L.O.:

d Easy Networking Models Understand the role of network layers

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28. Which of the following is a function of the transport layer? a. b. c. d. e.

linking the physical layer to the network layer formatting messages by indicating where they start and end deciding which route the message should take breaking long messages into several smaller messages specifying the type of connection and the electrical signals, radio waves, or light pulses that pass through it

Answer: Difficulty: Reference: L.O.:

d Easy Networking Models Understand the role of network layers

29. Which of the following is a term used to group together the physical and data link layers? a. b. c. d. e.

Internetwork layers Hardware layers Software layers Middleware layers Application layers

Answer: Difficulty: Reference: L.O.:

b Medium Networking Models Understand the role of network layers

30. Which of the following would be a standard or protocol used at the Data Link layer of the Internet or OSI model? a. b. c. d. e.

IP TCP Ethernet HTTP FTP

Answer: Difficulty: Reference: L.O.:

c Medium Networking Models Understand the role of network layers

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31. In which layer of the Internet model would the HTTP protocol be used? a. b. c. d. e.

physical application transport network data link

Answer: Difficulty: Reference: L.O.:

b Medium Networking Models Understand the role of network layers

32. A(n) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand. a. b. c. d. e.

agreement specification protocol regulation policy

Answer: Difficulty: Reference: L.O.:

c Medium Networking Models Understand the role of network layers

33. The network layer of the Internet model uses the _____________ protocol to route messages though the network. a. b. c. d. e.

TCP HTTP FTP SMTP IP

Answer: Difficulty: Reference: L.O.:

e Medium Networking Models Understand the role of network layers

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34. The primary reason for networking standards is to: a. b. c. d.

simplify cost accounting for networks ensure that hardware and software produced by different vendors can work together make it more difficult to develop hardware and software that link different networks ensure that all network components of a particular network can be provided by only one vendor e. lock customers into buying network components from one vendor Answer: Difficulty: Reference: L.O.:

b Medium Network Standards Be familiar with the role of network standards

35. Which of the following is not true about de jure standards? a. b. c. d. e.

They are always developed before de facto standards.

One example exists for network layer software (IP).

They can be developed by an official industry body.

They can take several years to develop.

They can be developed by a government body.

Answer: Difficulty: Reference: L.O.:

a Medium Network Standards Be familiar with the role of network standards

36. Which of the following is not true about de facto standards? a. b. c. d.

They never evolve into de jure standards.

They are those standards that emerge in the marketplace.

They tend not to be developed by an official industry or government body.

They are generally supported by more than one vendor but de facto standards have no official standing. e. They tend to emerge based upon the needs/response of the marketplace.

Answer: Difficulty: Reference: L.O.:

a Medium Network Standards Be familiar with the role of network standards

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37. The three stages of the de jure standardization process are ______________________. a. b. c. d. e.

specification, identification of choices and acceptance. planning, implementing and acceptance. brainstorming, identification and implementing. specification, formalization, and acceptance. none of the above.

Answer: Difficulty: Reference: L.O.:

a Easy Network Standards Be familiar with the role of network standards

38. Which of the following is true about ISO: a. b. c. d. e.

It makes technical recommendations about data communications interfaces Its name stands for International Organization for Standardization It is based in Geneva, Switzerland It is one of the most important standards-making bodies All of the above

Answer: Difficulty: Reference: L.O.:

e Medium Network Standards Be familiar with the role of network standards

39. Which of the following is not true about ITU-T: a. It is the technical standards-setting organization of the United Nations International Telecommunications Union b. It is the International Telecommunications Union – Telecommunications Group c. Its membership is limited to U.S. telephone companies d. It is based in Geneva, Switzerland e. Its membership is comprised of representatives from over 200 member countries Answer: Difficulty: Reference: L.O.:

c Medium Network Standards Be familiar with the role of network standards

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40. The American National Standards Institute: a. is the coordinating organization for the United States’ national system of standards b. is a professional society in the U.S. whose standards committees focus on local area network standards c. sets the standards that govern how much of the Internet will operate d. is an agency that develops federal information processing standards for the federal government e. makes technical recommendations about global telephone rates Answer: Difficulty: Reference: L.O.:

a Medium Network Standards Be familiar with the role of network standards

41. The Internet standards organization that will allow anyone to join is __________________. a. b. c. d. e.

ANSI ISO IETF IEEE ITU-T

Answer: Difficulty: Reference: L.O.:

c Medium Network Standards Be familiar with the role of network standards

42. Which standards body is responsible for the development of local area network (LAN) standards? a. b. c. d. e.

ANSI ISO IETF IEEE ITU-T

Answer: Difficulty: Reference: L.O.:

d Medium Network Standards Be familiar with the role of network standards

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43. Which of the following is not an application layer standard? a. b. c. d. e.

HTTP POP T1 IMAP HTML

Answer: Difficulty: Reference: L.O.:

c Easy Network Standards Be familiar with the role of network standards

44. Which of the following is not a data link layer standard? a. b. c. d. e.

HTTP Ethernet T1 PPP Frame Relay

Answer: Difficulty: Reference: L.O.:

a Easy Network Standards Be familiar with the role of network standards

45. Which of the following is not an important future trend in communication and networking? a. b. c. d. e.

development of online batch systems massively online systems the Internet of Things Wireless LAN BYOD

Answer: Difficulty: Reference: L.O.:

a Medium Future Trends Be aware of three key trends in communications and networking

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46. __________ ensure that hardware and software produced by different vendors work together. a. b. c. d. e.

Delimiters Standards ASPs RBOCs Intranets

Answer: Difficulty: Reference: L.O.:

b Easy Network Standards Be familiar with the role of network standards

47. A _____________ is the input-output hardware device at the end user’s end of a communication circuit in a client-server network. a. b. c. d. e.

server circuit client host mouse

Answer: Difficulty: Reference: L.O.:

c Easy Data Communications Networks Be familiar with the major components of and types of networks

48. A(n) ___________ is similar to an intranet in that it uses Internet technologies, but is developed for users outside the organization. a. b. c. d. e.

intranet Usenet Wide Area Network extranet sneaker net

Answer: Difficulty: Reference: L.O.:

d Easy Network Models Be familiar with the major components of and types of networks

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49. Taken together, the physical and data link layers are called the ____________________. a. b. c. d.

Internet layer Hardware layer Internetwork layer Application layer

Answer: Difficulty: Reference: L.O.:

b Easy Network Models Be familiar with the major components of and types of networks

50. BYOD stands for a. b. c. d.

Bring Your Own Device Bring Your Own Database Build Your Own Device Build Your Own Database

Answer: Difficulty: Reference: L.O.:

a Easy Future Trends Be aware of three key trends in communications and networking

51. When a user accesses an application via a web browser on their mobile device, this is referred to as a. b. c. d.

a browser-based approach a native app Internet Explorer BYOD

Answer: Difficulty: Reference: L.O.:

a Easy Future Trends Be aware of three key trends in communications and networking

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52. A MOOC is an example of a(n) a. b. c. d.

BYOD massively online technology native app browser-based technology

Answer: Difficulty: Reference: L.O.:

b Easy Future Trends Be aware of three key trends in communications and networking

53. A network administrator has received several reports from users of the network that the intranet website on one of company servers is not accessible, but the same users are still able to retrieve their email being stored on the same server. What layer of the Internet model does this problem appear to reside at? a. b. c. d. e.

physical transport network application data link

Answer: Difficulty: Reference: L.O.:

d Medium Network Models Understand the role of network layers

54. A junior network administrator has used the wrong cable type to connect his/her computer to the administrative port on a router and cannot establish a terminal session with the device. What layer of the Internet model does this problem appear to reside at? a. b. c. d. e.

physical transport network application data link

Answer: Difficulty: Reference: L.O.:

a Medium Network Models Understand the role of network layers

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55. Which of the following correctly represents order of the seven layers of the OSI model from layer 1 to layer 7? a. b. c. d. e.

physical, network, data link, session, transport, application, presentation physical, data link, network, transport, session, application, presentation physical, data link, network, transport, session, presentation, application data link, physical, network, session, transport, application, presentation data link, physical, network, transport, session, presentation, application

Answer: Difficulty: Reference: L.O.:

c Medium Network Models Understand the role of network layers

56. When a developer creates an application for each type of device that might be used, this is referred to as a. b. c. d.

a browser-based approach a native app Internet Explorer BYOD

Answer: Difficulty: Reference: L.O.:

b Easy Future Trends Be aware of three key trends in communications and networking

57. The _______ is a connection of computers and networks built into common, everyday devices. a. b. c. d.

BYOD Internet of Things Web of lies Wide Area Network

Answer: Difficulty: Reference: L.O.:

b Easy Future Trends Be aware of three key trends in communications and networking

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Chapter 2 Application Layer

True-False Questions The following are possible True/False questions for tests. The statement is given and the answer is provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. An application architecture is the way in which the functions of the application layer are performed solely by the clients in the network.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

2. The five general functions of any application program are: data storage, data access logic, application logic, presentation logic, and Internet interface.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

3. A server farm is a group of computers that are linked together so they act as a one computer.

Answer: Difficulty: Reference: L.O.:

True Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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4. Host-based and client-based networks are similar in that the client computer performs most of the work.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

5. The earliest data communications networks were client-server networks.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

6. As the demand for more and more network applications grow; host-based computing becomes the best solution.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

7. Your typical web browsing scenario where a person using a web browser accesses a web page from a server on the Internet is a good example of a client-server application architecture.

Answer: Difficulty: Reference: L.O.:

True Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peerto-peer application architectures

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8. In a client-server network, the presentation logic is the responsibility of the client computer.

Answer: Difficulty: Reference: L.O.:

True Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

9. The two functions of middleware are to: 1) provide a standard way of communicating that can translate between software from different vendors, and 2) manage the message transfer between clients and servers so that clients do not need to ‘know’ which server contains the application’s data.

Answer: Difficulty: Reference: L.O.:

True Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

10. Middleware is the software that sits between the application software on the client and the application software on the server.

Answer: Difficulty: Reference: L.O.:

True Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peerto-peer application architectures

11. In the three-tier architecture, the software on the client computer is responsible for the presentation logic, an application server is responsible for the application logic and a separate database server is responsible for the data access logic and data storage.

Answer: Difficulty: Reference: L.O.:

True Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peerto-peer application architectures

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12. A “thin client” approach places most of the application logic on the client.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

13. The application architecture called the distributed computing model uses the “thick” client approach.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

14. Scalability refers to the ability to increase or decrease the capacity of the computing infrastructure in response to changing capacity needs.

Answer: Difficulty: Reference: L.O.:

True Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

15. To use the Web, each client computer requires a data link layer software package called a Web browser.

Answer: Difficulty: Reference: L.O.:

False Easy World Wide Web Understand how the Web works

16. The standard protocol for communication between a Web browser and a Web server is the web protocol.

Answer: Difficulty: Reference: L.O.:

False Medium World Wide Web Understand how the Web works

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17. The World Wide Web was conceived at University of Utah as part of the development of the Internet.

Answer: Difficulty: Reference: L.O.:

False Easy World Wide Web Understand how the Web works

18. A request header for an HTTP request starts with a command, such as GET, and ends with the HTTP version number that the browser understands.

Answer: Difficulty: Reference: L.O.:

False Easy World Wide Web Understand how the Web works

19. All three parts (request line, request header, request body) of an HTTP request from a web browser to a web server are required when a request is made.

Answer: Difficulty: Reference: L.O.:

False Medium Electronic Mail Understand how email works

20. The Simple Mail Transfer Protocol is the least commonly used e-mail standard.

Answer: Difficulty: Reference: L.O.:

False Easy Electronic Mail Understand how email works

21. The two-tier e-mail architecture does not require any application software on the client computer.

Answer: Difficulty: Reference: L.O.:

False Easy Electronic Mail Understand how email works

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22. Using the POP standard for client to server e-mail communication, the e-mail messages remain on the server computer.

Answer: Difficulty: Reference: L.O.:

False Easy Electronic Mail Understand how email works

23. Web-based e-mail like Gmail is an example of three-tier client-server architecture that provides access to e-mail messages.

Answer: Difficulty: Reference: L.O.:

True Medium Electronic Mail Understand how email works

24. The fundamental problem in client-based networks is that all data on the server must travel to the client for processing.

Answer: Difficulty: Reference: L.O.:

True Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

25. Cloud-hosted virtual desktops are now available through a service called DaaS allowing users to access the same client computer (virtual desktop) from any computer and any location.

Answer: Difficulty: Reference: L.O.:

True Medium Other Applications Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

26. There are four general functions of any application program.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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27. For an application program, the services logic is the user interface.

Answer: Difficulty: Reference: L.O.:

False Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

28. Cloud computing is just outsourcing.

Answer: Difficulty: Reference: L.O.:

True Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

29. There are only a handful of products one can choose from to do a webcast.

Answer: Difficulty: Reference: L.O.:

False Easy Other Applications Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

30. Telnet requires an application layer program on the client computer and an application layer program on the server or host computer.

Answer: Difficulty: Reference: L.O.:

True Easy Other Applications Be aware of how Telnet and instant messaging works

31. Telnet poses no security threat.

Answer: Difficulty: Reference: L.O.:

False Easy Other Applications Be aware of how Telnet and instant messaging works

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32. Telnet is a fairly modern standard.

Answer: Difficulty: Reference: L.O.:

False Easy Other Applications Be aware of how Telnet and instant messaging works

33. Telnet encrypts keystrokes that are sent over the network.

Answer: Difficulty: Reference: L.O.:

False Easy Other Applications Be aware of how Telnet and instant messaging works

34. One program that conforms to the Telnet standard is PuTTY. Answer: Difficulty: Reference: L.O.:

True Easy Other Applications Be aware of how Telnet and instant messaging works

35. With respect to costs for a client-server network, personal computers used as clients in a client-server network cost about the same as mainframes for the same amount of computing power.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

36. With respect to costs for a client-server network, more network capacity, which costs more money, is required for client-server networks than for client-based networks.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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37. With respect to costs for a client-server network, experts believe that client server architectures can be complex, but that developing application software for host based architectures is usually cheaper.

Answer: Difficulty: Reference: L.O.:

True Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

38. With respect to costs for a client-server network, updating the network with new version of software tends to be less expensive in a client-server network since the software is centralized in one client.

Answer: Difficulty: Reference: L.O.:

False Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. A(n) __________ is the way in which the functions of the application layer software are spread among the clients and servers in the network. a. b. c. d. e.

anonymous FTP data access logic fat client application architecture response status architecture

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

2. A ________ is a very large general-purpose computer that is capable of performing very many functions as if these are done simultaneously, and storing extremely large amounts of data. a. b. c. d. e.

workstation transaction terminal cluster mainframe personal computer

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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3. A ________ is a group of computers linked together so that they appear to act as one computer. a. b. c. d. e.

workstation transaction terminal server farm network computer transaction terminal

Answer: Difficulty: Reference: L.O.:

c Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

4. With the two-tier client-server architecture, the server is responsible for the ________ logic. a. b. c. d. e.

application presentation data access session physical

Answer: Difficulty: Reference: L.O.:

c Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

5. Which of the following is not a general function by any application program? a. b. c. d. e.

data storage data access logic application logic presentation logic application access storage

Answer: Difficulty: Reference: L.O.:

e Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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6. _________ is an application program function that deals with storing and retrieving data. a. b. c. d. e.

Data storage Data access logic Application logic Presentation logic Application access storage

Answer: Difficulty: Reference: L.O.:

a Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

7. An application program function is __________, or the processing required to access data. a. b. c. d. e.

data storage data access logic application logic presentation logic application access storage

Answer: Difficulty: Reference: L.O.:

b Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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8. ______________, or the algorithms or business logic programmed into the application, can be simple or complex depending on the application. a. b. c. d. e.

Data storage Data access logic Application logic Presentation logic Application access storage

Answer: Difficulty: Reference: L.O.:

c Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

9. ________ is the presentation of information to the user and the acceptance of the user’s commands. a. b. c. d. e.

Data storage Data access logic Application logic Presentation logic Application access storage

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

10. One underlying problem with a host-based network is that: a. b. c. d. e.

there are economies of scale because all computer resources are centralized. the server can get overloaded since it must process all messages. the architecture is relatively simple and works well. the server is the one point of control which simplifies security. clients (terminals) do not require sophisticated hardware/software because they do not perform most of the work in this type of architecture.

Answer: Difficulty: Reference: L.O.:

b Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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11. With a client-based network, one fundamental problem is that: a. the clients each must store all the data. b. the server does not have any data storage capability. c. the host or server must perform presentation logic, application logic, and data access logic at the same time. d. all data on the server must travel to the client for processing. e. the clients must perform the data storage logic.

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

12. With the two-tier client-server architecture, the client is responsible for the ________ logic. a. b. c. d. e.

session presentation data access data storage networking

Answer: Difficulty: Reference: L.O.:

b Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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13. Client-server architectures: a. cannot connect computers that use different hardware b. are one of the least used network architectures today c. can use middleware to provide a standard way of communicating between software from more than one vendor d. assign the responsibility for the presentation logic to the server e. were the earliest type of network architectures Answer: Difficulty: Reference: L.O.:

c Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

14. How are the application architecture functions split up in a client-server network? a. the presentation logic and data storage are on the client, while the data access logic is on the server b. the data storage, data access, and presentation logic are on the client c. the presentation logic is on the client, while the data storage and data access logic are on the server d. the data storage and data access logic are on the client, while the presentation logic are on the server e. the presentation logic and data access logic are on the client, and the data storage is on the server Answer: Difficulty: Reference: L.O.:

c Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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15. In a client-server network, _________ gets software from different vendors to work together. a. b. c. d. e.

a front-end processor serverware middleware centerware programmer

Answer: Difficulty: Reference: L.O.:

c Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

16. ____________ is not an important middleware standard. a. b. c. d. e.

CORBA (Common Object Request Broker Architecture Distributed Computed Environment (DCE) Asynchronous Transfer Mode (ATM) Open Database Connectivity (ODBC) none of the above is an appropriate answer

Answer: Difficulty: Reference: L.O.:

c Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

17. A(n) _________-tiered architecture uses only two sets of computers: one set of clients and one set of servers. a. b. c. d. e.

one two three five n

Answer: Difficulty: Reference: L.O.:

b Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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18. In the three tier architecture, the software on the client computer is responsible for the ____________. a. b. c. d. e.

presentation logic application logic data access logic data storage application storage

Answer: Difficulty: Reference: L.O.:

A Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

19. An n-tier architecture: a. is generally more “scalable” than a three-tiered architecture. b. is generally less “scalable” than a three-tiered architecture. c. uses only two sets of computers in which the clients are responsible for the application and presentation logic, and the servers are responsible for the data. d. uses exactly three sets of computers in which the client is responsible for presentation, one set of servers is responsible for data access logic and data storage, and application logic is spread across two or more different sets of servers. e. puts less load on a network than a two-tiered architecture because there tends to be less communication among the servers.

Answer: Difficulty: Reference: L.O.:

a Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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20. One disadvantage of the ____________ architecture is that places a greater load on the network. a. b. c. d. e.

one-tier two-tier three-tier n-tier layered

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

21. A “thin client” architecture approach: a. b. c. d. e.

always is a two-tier network architecture always is an n-tiered architecture places all or almost all of the application logic on the client places all or almost all of the application logic on the server refers to the size of the cable connecting the clients to the network

Answer: Difficulty: Reference: L.O.:

d Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

22. A “thick client” architecture approach: a. b. c. d. e.

always is a two-tier network architecture always is an n-tiered architecture places all or almost all of the application logic on the client places all or almost all of the application logic on the server refers to the size of the cable connecting the clients to the network

Answer: Difficulty: Reference: L.O.:

c Easy Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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23. With the “thin client” architecture, when an application changes, only the _________ with the application logic needs to be updated. a. b. c. d. e.

client server middleware hardware software

Answer: Difficulty: Reference: L.O.:

b Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

24. With respect to costs for a client-server network, which of the following is true? a. Personal computers used as clients in a client-server network cost about the same as mainframes for the same amount of computing power. b. More network capacity, which costs more money, is required for client-server networks than for client-based networks. c. Experts believe that client server architectures can be complex, but that developing application software for host based architectures is usually cheaper. d. Updating the network with new version of software tends to be less expensive in a client-server network since the software is centralized in one client. e. None of the above Answer: Difficulty: Reference: L.O.:

c Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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25. The idea for a special hypertext network, called the World Wide Web, was conceived of by: a. Microsoft in 1994 as part of the Windows 95 project b. Tim Berners-Lee at the European Laboratory for Particle Physics (CERN) in 1989 c. Vinton Cerf, for the U.S. Department of Defense in 1969 as a network of four computers called ARPANET d. Howard Flieshman of IBM in 1982 as part of the development of the IBM PC e. the University of Minnesota as an extension of Gopher Answer: Difficulty: Reference: L.O.:

b Easy World Wide Web Understand how the Web works

26. Marc Andreessen led a team that developed the first graphical Web browser, which was called: a. b. c. d. e.

Internet Explorer Mosaic Firebird Netscape Navigator Mozilla

Answer: Difficulty: Reference: L.O.:

b Easy World Wide Web Understand how the Web works

27. To interact with the World Wide Web, a client computer needs an application layer software package called a: a. b. c. d. e.

web browser web server telnet package uniform resource locator package router package

Answer: Difficulty: Reference: L.O.:

a Easy World Wide Web Understand how the Web works

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28. Each server on a network that needs to act as a web server needs an application layer software package called a (n) ______________. a. b. c. d. e.

browser application web web server operating system none of the above

Answer: Difficulty: Reference: L.O.:

c Easy World Wide Web Understand how the Web works

29. To get a page from the Web, a user must type in a URL, which stands for: a. b. c. d. e.

Unknown Resource Locator Unknown Router Location Uniform Router Location Uniform Resource Locator Uniform Resource Library

Answer: Difficulty: Reference: L.O.:

d Easy World Wide Web Understand how the Web works

30. The protocol that makes it possible for a Macintosh web browser to be able to retrieve a Web page from a Microsoft Web server is called the _____________________. a. b. c. d. e.

Hypertext Transfer Protocol File Transfer Protocol Simple Mail Transfer Protocol Internet Message Access Protocol Hyperlink Transfer Protocol.

Answer: Difficulty: Reference: L.O.:

a Medium World Wide Web Understand how the Web works

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31. There are optional and required parts of an HTTP request. They are: a. b. c. d. e.

request address, request body request address, request header, request body request line, request header request line, request body request line, request header, request body

Answer: Difficulty: Reference: L.O.:

e Medium World Wide Web Understand how the Web works

32. There are required and optional parts of an HTTP response. They are: a. b. c. d. e.

response status, response header, response body response address, response header, response body response status, response body response address, response header response status, response header

Answer: Difficulty: Reference: L.O.:

a Medium World Wide Web Understand how the Web works

33. A response status code of 404 means: a. b. c. d. e.

the requested page was not found the server is currently unavailable the sever is currently busy your browser is incompatible with the Web server software. your browser needs to be updated to the latest version.

Answer: Difficulty: Reference: L.O.:

a Easy World Wide Web Understand how the Web works

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34. The acronym, HTML, refers to: a. b. c. d. e.

Header Markup Language Hypertext Markup Locator Hypertext Markup Language Hypertext Markup Library Hypertext Modulating Language

Answer: Difficulty: Reference: L.O.:

c Easy World Wide Web Understand how the Web works

35. The most commonly used e-mail standard is: a. b. c. d. e.

Simple Mail Transfer Protocol X.400 CMC Post Office Protocol Telnet

Answer: Difficulty: Reference: L.O.:

a Easy Electronic Mail Understand how email works

36. In a two-tier client-server architecture, a client computer needs to use an application layer software package called a ________________ to send e-mail: a. b. c. d. e.

message transfer agent router agent mail user agent Webcast package gateway agent

Answer: Difficulty: Reference: L.O.:

c Medium Electronic Mail Understand how email works

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37. Which of the following is not an example of a mail user agent software package? a. b. c. d. e.

Outlook Express Microsoft Word Eudora Microsoft Outlook All of these are mail user agent packages

Answer: Difficulty: Reference: L.O.:

b Medium Electronic Mail Understand how email works

38. Another term for a mail user agent is: a. b. c. d. e.

message transfer agent router agent e-mail client Webcast package Web client

Answer: Difficulty: Reference: L.O.:

c Easy Electronic Mail Understand how email works

39. IMAP (Internet Message Access Protocol): a. is a set of standards that define how email is to be processed between mail servers b. is exactly the same as SMTP c. copies an e-mail message from the client computer’s hard disk, deletes it from the client, and stores it on the mail server d. is exactly the same as POP e. permits an e-mail message to remain stored on the mail server even after they have been read by a client computer Answer: Difficulty: Reference: L.O.:

e Easy Electronic Mail Understand how email works

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40. In a ___________ architecture, computers are both client and server, thus sharing the work. a. b. c. d. e.

Host-based Client-based Client-server Peer-to-peer Network

Answer: Difficulty: Reference: L.O.:

d Medium Application Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

41. The acronym, MIME, refers to: a. b. c. d. e.

Multimedia Internet Mail Enterprise Multiple Internet Media Extension Multipurpose Internet Mail Extension Media Internet Mail Extension Multimedia Internet Mime Extension

Answer: Difficulty: Reference: L.O.:

c Easy Electronic Mail Understand how email works

42. One of the most frequently used Telnet applications is a. b. c. d. e.

WS-FTP PuTTY Outlook Word FTP

Answer: Difficulty: Reference: L.O.:

b Medium Other Applications Be aware of how Telnet and instant messaging works

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43. What technique is used by most videoconferencing applications to reduce the amount of data being transmitted? a. b. c. d. e.

hashing encryption authentication identification compression

Answer: Difficulty: Reference: L.O.:

e Medium Other Applications Be aware of how Telnet and instant messaging works

44. Which of the following is not true about Telnet? a. Telnet requires an application layer program on the client computer and an application layer program on the server or host computer. b. Telnet poses no security threat. c. Telnet was designed in the early days of the Internet. d. Keystrokes are sent over the network in clear text. e. One program that conforms to the Telnet standard is PuTTY. Answer: Difficulty: Reference: L.O.:

b Medium Other Applications Be aware of how Telnet and instant messaging works

45. _________ is a special type of one directional; videoconferencing in which content is sent from the server to the user. a. b. c. d. e.

Broadcasting Instant messaging Webcasting H.323 Net Meeting.

Answer: Difficulty: Reference: L.O.:

c Medium Other Applications Be aware of how Telnet and instant messaging works

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46. In a host-based system with a mainframe, upgrades to the host are _____________. a. b. c. d. e.

Small Cheap Lumpy Never going to happen Always performed annually

Answer: Difficulty: Reference: L.O.:

c Easy Application Architecture Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

47. The software that runs on the mail server is referred to as the ____________ a. b. c. d. e.

Mail transfer agent Mail user agent Microsoft Outlook Web server SMTP

Answer: Difficulty: Reference: L.O.:

A Easy Electronic Mail Understand how email works

48. The standards H.320, H.323, and MPEG-2 are commonly used with a. b. c. d. e.

Telnet Videoconferencing Email IM Microsoft Office

Answer: Difficulty: Reference: L.O.:

B Medium Other Applications Be aware of how Telnet and instant messaging works

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49. The ________________ cloud deployment model provides the highest levels of control, privacy and security. a. b. c. d. e.

private public community hybrid Amazon (AWS)

Answer: Difficulty: Reference: L.O.:

a Easy Application Architecture Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

50. The ________________ clouds realize the benefits from cloud infrastructure (such as speed of deployment) with the added level of privacy and security that private clouds offer. a. b. c. d. e.

private public community hybrid Amazon (AWS)

Answer: Difficulty: Reference: L.O.:

c Easy Application Architecture Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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51. With ______________, the cloud provider manages the hardware including servers, storage, and networking components. The organization is responsible for all the software, including operating system (and virtualization software), database software, and its applications and data. a. b. c. d. e.

private clouds hardware clouds storage services IaaS Amazon (AWS)

Answer: Difficulty: Reference: L.O.:

d Easy Application Architecture Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

52. In this type of cloud model, the cloud provider manages the hardware, while the organization is responsible for everything else. a. b. c. d.

platform as a service infrastructure as a service software as a service servers as a service

Answer: Difficulty: Reference: L.O.:

b Easy Cloud Computing Architectures Understand host-based, client-based, client-server, cloud-based, and peer-to-peer application architectures

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Chapter 3 Physical Layer True-False Questions The following are possible True/False questions for tests. The statement is given and the answer is provided in square brackets. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic are also furnished.

1. A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent through the connection.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with the different types of network circuits and media

2. Computers produce digital data whose values are binary: 0 or 1.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand digital transmission of digital data

3. With modem communications, the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Be familiar with analog and digital modems

4. Digital transmission produces more errors than analog transmission.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand digital transmission of digital data

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5. Newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand Analog Transmission of Digital Data

6. In a multipoint circuit configuration, each computer has a dedicated circuit between itself and each of the other computers in the network.

Answer: Difficulty: Reference: L.O.:

False Easy Circuits Be familiar with the different types of network circuits and media

7. In a multipoint circuit configuration, each computer can use the circuit at the same time.

Answer: Difficulty: Reference: L.O.:

False Easy Circuits Be familiar with the different types of network circuits and media

8. In simplex transmission, the data flows in both directions at the same time.

Answer: Difficulty: Reference: L.O.:

False Easy Circuits Be familiar with the different types of network circuits and media

9. A walkie-talkie is an example of half-duplex transmission.

Answer: Difficulty: Reference: L.O.:

True Medium Circuits Be familiar with the different types of network circuits and media

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10. The amount of time it takes to switch between sending and receiving in half-duplex transmission is called the propagation delay.

Answer: Difficulty: Reference: L.O.:

False Easy Communication Media Be familiar with the different types of network circuits and media

11. In full-duplex transmission, two stations can send and receive simultaneously.

Answer: Difficulty: Reference: L.O.:

True Easy Circuits Be familiar with the different types of network circuits and media

12. The medium is the physical matter or substance that carries the voice or data transmission.

Answer: Difficulty: Reference: L.O.:

True Easy Communication Media Be familiar with the different types of network circuits and media

13. Guided media refers to the type of media in which the message is broadcast through the air.

Answer: Difficulty: Reference: L.O.:

False Easy Communication Media Be familiar with the different types of network circuits and media

14. Coaxial cable costs less and offers less shielding to electrical interference than twisted pair cable.

Answer: Difficulty: Reference: L.O.:

False Medium Communication Media Be familiar with the different types of network circuits and media

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15. Fiber optic cable carries signals in traditional electrical form.

Answer: Difficulty: Reference: L.O.:

False Easy Communication Media Be familiar with the different types of network circuits and media

16. Multimode fiber is capable of longer transmission distances than single mode fiber.

Answer: Difficulty: Reference: L.O.:

False Easy Communication Media Be familiar with the different types of network circuits and media

17. Radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency.

Answer: Difficulty: Reference: L.O.:

True Medium Communication Media Be familiar with the different types of network circuits and media

18. WDM is a version of FDM used in fiber-optic cables.

Answer: Difficulty: Reference: L.O.:

True Medium Communication Media Be familiar with the different types of network circuits and media

19. Microwave transmissions require a line of sight between any two points.

Answer: Difficulty: Reference: L.O.:

True Easy Communication Media Be familiar with the different types of network circuits and media

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20. Propagation delay is negligible with satellite transmission.

Answer: Difficulty: Reference: L.O.:

False Medium Communication Media Be familiar with the different types of network circuits and media

21. One form of interference with satellite transmission is called raindrop attenuation in which the transmissions are absorbed by heavy rain.

Answer: Difficulty: Reference: L.O.:

True Medium Communication Media Be familiar with the different types of network circuits and media

22. Fiber optic cable can only be used on LANs. Answer: Difficulty: Reference: L.O.:

False Easy Communication Media Be familiar with the different types of network circuits and media

23. Radio, microwave and satellite are all examples of guided media.

Answer: Difficulty: Reference: L.O.:

False Medium Communication Media Be familiar with the different types of network circuits and media

24. Of all the media available, fiber optic provides the highest transmission speeds.

Answer: Difficulty: Reference: L.O.:

True Medium Communication Media Be familiar with the different types of network circuits and media

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25. Coding schemes are groups of bits that translate into the “alphabet” of any given system.

Answer: Difficulty: Reference: L.O.:

True Easy Digital Transmission of Digital Data Understand digital transmission of digital data

26. ASCII is the least popular code for data communications.

Answer: Difficulty: Reference: L.O.:

False Easy Digital Transmission of Digital Data Understand digital transmission of digital data

27. The predominant method of transferring information internally in a computer is via parallel mode.

Answer: Difficulty: Reference: L.O.:

True Easy Digital Transmission of Digital Data Understand digital transmission of digital data

28. Serial mode transmission is much faster than parallel mode transmission.

Answer: Difficulty: Reference: L.O.:

False Easy Digital Transmission of Digital Data Understand digital transmission of digital data

29. Nonreturn to zero is a type of unipolar signaling Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of Digital Data Understand digital transmission of digital data

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30. With nonreturn to zero signaling, the voltage alternates between zero and a positive or negative voltage.

Answer: Difficulty: Reference: L.O.:

False Easy Digital Transmission of Digital Data Understand digital transmission of digital data

31. Ethernet, a common LAN technology, uses Manchester encoding.

Answer: Difficulty: Reference: L.O.:

True Easy Digital Transmission of Digital Data Understand digital transmission of digital data

32. Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low-to-high in the middle of the signal.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of Digital Data Understand digital transmission of digital data

33. Digital transmission occurs when the signal sent over the transmission media constantly varies among an infinite number of states.

Answer: Difficulty: Reference: L.O.:

False Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

34. Frequency is the number of cycles per second and is expressed in Hertz.

Answer: Difficulty: Reference: L.O.:

True Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

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35. Amplitude, frequency and phase are all characteristics of a sound wave.

Answer: Difficulty: Reference: L.O.:

True Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

36. Frequency modulation refers to the changing of the height of the sound wave.

Answer: Difficulty: Reference: L.O.:

False Medium Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

37. Baud rate is the number of bits transmitted per second.

Answer: Difficulty: Reference: L.O.:

False Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

38. Signal bandwidth is the difference between the highest and lowest frequencies in a band.

Answer: Difficulty: Reference: L.O.:

True Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

39. Data compression can increase the throughput of a communication link.

Answer: Difficulty: Reference: L.O.:

True Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

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40. A codec converts an incoming digital signal to an analog signal for transmission over an analog network.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of Analog Data Understand digital transmission of analog data

41. One way to reduce quantizing errors is to increase the sampling rate of the analog signal.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of Analog Data Understand digital transmission of analog data

42. The “local loop” refers to the wires that run from the customer premises to the telephone switch of the telephone company.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of Analog Data Understand digital transmission of analog data

43. Multiplexing increases the cost of provisioning network circuits.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of Analog Data Understand digital transmission of analog data

44. Frequency division multiplexing divides the circuit into a set of different time slots.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of Analog Data Understand digital transmission of analog data

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45. Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of Analog Data Understand digital transmission of analog data

46. Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of Analog Data Understand digital transmission of analog data

47. Wavelength division multiplexing can only be used with copper cables.

Answer: Difficulty: Reference: L.O.:

False Easy Digital Transmission of Analog Data Understand digital transmission of analog data

48. Digital transmission permits higher maximum transmission rates when compared to analog.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand digital transmission of digital data

49. Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

Answer: Difficulty: Reference: L.O.:

False Easy Data Flow Be familiar with multiplexing

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50. Based on the TIA/EIA 568-B structured cabling standard, the cabling that runs from the telecommunications closet to each work area is called backbone cabling.

Answer: Difficulty: Reference: L.O.:

False Easy Circuits Be familiar with the different types of network circuits and media

51. Parallel transmission is most often used for sending data on a circuit that is made up of one wire.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of digital data Understand digital transmission of digital data

52. Parallel transmission is distinguished from serial transmission by the fact that the transmitting device sends a single bit, then a second bit, and so on, until all the bits are transmitted.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of digital data Understand digital transmission of digital data

53. Parallel transmission is the same as serial transmission.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of digital data Understand digital transmission of digital data

54. Parallel transmission is only used for analog data.

Answer: Difficulty: Reference: L.O.:

False Medium Digital Transmission of digital data Understand digital transmission of digital data

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55. Serial transmission is slower than parallel transmission.

Answer: Difficulty: Reference: L.O.:

True Medium Digital Transmission of digital data Understand digital transmission of digital data

56. The longer the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire.

Answer: Difficulty: Reference: L.O.:

False Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

57. The shorter the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire.

Answer: Difficulty: Reference: L.O.:

False Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

58. Bandwidth is constant across any wire, therefore distance is not relevant to its capacity.

Answer: Difficulty: Reference: L.O.:

True Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

59. The longer the distance of a telephone wire between sender and recipient, the higher the bandwidth across that wire.

Answer: Difficulty: Reference: L.O.:

False Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

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60. Bandwidth is not a term that can be used when discussing telephone transmissions.

Answer: Difficulty: Reference: L.O.:

False Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

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Multiple Choice The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. Data is physically transmitted from one computer or terminal to another in the ________ layer. a. b. c. d. e.

physical transport application terminal data link

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with the different types of network circuits and media

2. ____________ refers to the transmission characteristics of the circuit. a. b. c. d. e.

Handshaking Virtual circuit Bonding Logical circuit Physical circuit

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the different types of network circuits and media

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3. Two fundamentally different types of data are: a. b. c. d. e.

DSL and ADSL asymmetric and symmetric Microsoft and IBM digital and analog local area and wide area

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the different types of network circuits and media

4. In general, networks designed to transmit primarily computer data are likely to be ________. a. b. c. d. e.

international level 1 numeric analog digital

Answer: Difficulty: Reference: L.O.:

e Easy Introduction Be familiar with the different types of network circuits and media

5. In general, older networks and local loops designed to transmit voice data are likely to be ________. a. b. c. d. e.

international level 2 numeric digital analog

Answer: Difficulty: Reference: L.O.:

e Easy Introduction Be familiar with the different types of network circuits and media

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6. Which of the following is not a key advantage of digital transmission? a. b. c. d. e.

It permits only low transmission rates.

It is more efficient.

It is simpler to integrate voice, video, and data on the same circuit.

It is more secure.

It produces fewer errors.

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Understand digital transmission of digital data

7. _________ is the basic physical layout of the circuit. a. b. c. d. e.

Point-to-point configuration Configuration Circuit configuration Circuit design Circuit plan

Answer: Difficulty: Reference: L.O.:

c Medium Circuits Be familiar with the different types of network circuits and media

8. A(n) __________ circuit is another name for a multipoint configuration. a. b. c. d. e.

analog dedicated point-to-point shared simplex

Answer: Difficulty: Reference: L.O.:

d Medium Circuits Be familiar with the different types of network circuits and media

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9. Which is not true about point-to-point circuits? a. b. c. d.

Point-to-point circuits are dedicated to the use of the two computers.

Point-to-point circuits are more expensive than multipoint circuits.

Point-to-point circuits are called dedicated circuits.

Point-to-point circuits reduce the amount of cable required and use the circuit more efficiently than multipoint circuits. e. Point-to-point circuits are used when the computers generate enough traffic to fill the capacity of the communication circuit.

Answer: d Difficulty: Medium Reference: Circuits L.O.: Be familiar with the different types of network circuits and media

10. Having a conversation with someone using a cellular phone is an example of _________ transmission. a. b. c. d. e.

simplex full-duplex half-duplex analog digital

Answer: Difficulty: Reference: L.O.:

b Easy Circuits Be familiar with the different types of network circuits and media

11. The ability to transmit in both directions, but only in one direction at a time is an example of _______________ transmission. a. b. c. d. e.

simplex full-duplex half-duplex analog digital

Answer: Difficulty: Reference: L.O.:

c Easy Circuits Be familiar with the different types of network circuits and media

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12. The two basic types of media are: a. b. c. d. e.

statistical and frequency guided and wireless (radiated) local and wide area attenuator and Gaussian duplexed and non-duplexed

Answer: Difficulty: Reference: L.O.:

b Easy Communication Media Be familiar with the different types of network circuits and media

13. Which of the following would be considered a type of wireless media? a. b. c. d. e.

unshielded twisted pair shielded twisted pair coaxial cable microwave fiber optics

Answer: Difficulty: Reference: L.O.:

d Medium Communication Media Be familiar with the different types of network circuits and media

14. The type of media usually installed on homes and businesses by the telephone company is called ____________. a. b. c. d. e.

fiber optic cable coaxial cable twisted pair phone cable phone wire

Answer: Difficulty: Reference: L.O.:

c Easy Communication Media Be familiar with the different types of network circuits and media

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15. The earliest type of fiber optic systems were: a. b. c. d. e.

Graded index multimode Attenuated Multimode Single mode Step mode

Answer: Difficulty: Reference: L.O.:

c Easy Communication Media Be familiar with the different types of network circuits and media

16. Another term for the weakening of a signal over distance is: a. b. c. d. e.

turnaround time propagation delay dispersion insulation attenuation

Answer: Difficulty: Reference: L.O.:

e Medium Communication Media Be familiar with the different types of network circuits and media

17. ___________ refers to the spreading of the signal that different parts of the signal arrive at different times at the destination. a. b. c. d. e.

Turnaround time Propagation delay Dispersion Insulation Attenuation

Answer: Difficulty: Reference: L.O.:

c Medium Communication Media Be familiar with the different types of network circuits and media

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18. Which of the following media can best withstand harsh environmental conditions? a. b. c. d. e.

shielded twisted pair unshielded twisted pair Cat 5 twisted pair coaxial cable fiber optic cable

Answer: Difficulty: Reference: L.O.:

e Medium Communication Media Be familiar with the different types of network circuits and media

19. __________ is a line-of-sight type of wireless media. a. b. c. d. e.

Coaxial cable Microwave Radio Twisted pair Fiber optic

Answer: Difficulty: Reference: L.O.:

b Medium Communication Media Be familiar with the different types of network circuits and media

20. _____________ can be thought of as dividing the circuit horizontally. a. b. c. d. e.

Frequency division multiplexing Statistical frequency division multiplexing Statistical time division multiplexing Time division multiplexing Wavelength division multiplexing

Answer: Difficulty: Reference: L.O.:

a Medium Circuits Be familiar with multiplexing

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21. Microwave transmission: a. b. c. d. e.

is a type of high frequency radio communication requires a clear line-of-sight path is typically used for long distance data transmission does not require the laying of any cable all of the above

Answer: Difficulty: Reference: L.O.:

e Easy Communication Media Be familiar with the different types of network circuits and media

22. ______________ refers to the time it takes for a signal to travel from sender to recipient (highly exaggerated with satellite transmission). a. b. c. d. e.

Line-of-sight effect Multimode index Saturation effect Raindrop attenuation Propagation delay

Answer: Difficulty: Reference: L.O.:

e Medium Communication Media Be familiar with the different types of network circuits and media

23. Which of the following is not an important factor to consider when selecting media to be used in a network? a. b. c. d. e.

prestige value of the type of media type of network cost transmission distance security

Answer: Difficulty: Reference: L.O.:

a Medium Communication Media Be familiar with the different types of network circuits and media

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24. Which of the following is the most secure wired media? a. b. c. d. e.

coaxial cable unshielded twisted pair shielded twisted pair fiber optic cable infrared

Answer: Difficulty: Reference: L.O.:

d Medium Communication Media Be familiar with the different types of network circuits and media

25. Which of the following media has the lowest error rates and the highest transmission speeds? a. b. c. d. e.

Coaxial cable Unshielded twisted pair Shielded twisted pair Fiber optic cable Infrared

Answer: Difficulty: Reference: L.O.:

d Medium Communication Media Be familiar with the different types of network circuits and media

26. Transmission speeds: a. are the same among all media b. are not a factor in selecting a media because all media have more than enough speed to serve current communication demands c. are a constant, 56Kbps, for all media types d. differ widely among media e. always have a direct correlation with security Answer: Difficulty: Reference: L.O.:

d Medium Communication Media Be familiar with the different types of network circuits and media

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27. A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters. a. b. c. d. e.

256 20 200 512 1024

Answer: Difficulty: Reference: L.O.:

e Medium Digital Transmission of digital data Understand digital transmission of digital data

28. ____________ is one of the most commonly used coding schemes used in data transmission. a. b. c. d. e.

ASCII ISDN MAU ATM FDM

Answer: Difficulty: Reference: L.O.:

a Easy Digital Transmission of digital data Understand digital transmission of digital data

29. The representation of the character A by the group of 8 bits, 01000001, is an example of: a. b. c. d. e.

digital coding phase modulation binary modulation analog transmission pitch variation

Answer: Difficulty: Reference: L.O.:

a Medium Digital Transmission of digital data Understand digital transmission of digital data

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30. When all bits of a character are transferred one after another, the bits are transferred in ___________ mode. a. b. c. d. e.

serial frequency division multiplexing parallel full complex

Answer: Difficulty: Reference: L.O.:

a Medium Digital Transmission of digital data Understand digital transmission of digital data

31. Which of the following statements is correct? a. Parallel transmission is most often used for sending data on a circuit that is made up of one wire. b. Parallel transmission is distinguished from serial transmission by the fact that the transmitting device sends a single bit, then a second bit, and so on, until all the bits are transmitted. c. Parallel transmission is only used for analog data. d. Serial transmission is slower than parallel transmission. e. Parallel transmission is the same as serial transmission.

Answer: Difficulty: Reference: L.O.:

d Medium Digital Transmission of digital data Understand digital transmission of digital data

32. ___________ is not a type of digital signaling technique. a. b. c. d. e.

Non-return-to-zero signaling Unipolar signaling Manchester encoding Return-to-zero signaling Data rate signaling

Answer: Difficulty: Reference: L.O.:

e Medium Digital Transmission of digital data Understand digital transmission of digital data

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33. With which type of digital signaling does the signal always return to zero volts after each bit? a. b. c. d. e.

Non-return-to-zero signaling Unipolar signaling Return-to-zero signaling Data rate signaling Huffman encoding signal

Answer: Difficulty: Reference: L.O.:

c Easy Digital Transmission of digital data Understand digital transmission of digital data

34. Which type of digital signaling would experience fewer errors because it has more distinct signals? a. b. c. d. e.

unipolar serial bipolar attenuation Huffman encoding signal

Answer: Difficulty: Reference: L.O.:

c Hard Digital Transmission of digital data Understand digital transmission of digital data

35. Which of the following is a characteristic of sound waves that can be modulated to convert digital data into analog signals? a. b. c. d. e.

phase attenuation bipolar bandwidth codec

Answer: a Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

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Chapter 3 Test Bank

36. The direction in which the sound wave begins is known as: a. b. c. d. e.

amplitude, which our ears detect as loudness frequency, which our ears detect as pitch phase bandwidth furlong

Answer: c Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

37. The height of a sound wave is called its: a. b. c. d. e.

frequency phase amplitude bandwidth furlong

Answer: c Difficulty: Easy Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

38. _____________ is not a form of modulation used to transform digital data into analog signals. a. b. c. d. e.

synchronous time division amplitude shift keying amplitude modulation frequency modulation phase modulation

Answer: a Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

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39. ____________ refers to changing the shape of the sound wave in different ways to represent a 1 or a 0. a. b. c. d. e.

Digitizing Sampling Modulation Demodulation Shaping

Answer: c Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

40. With respect to converting digital data into analog signals, AM stands for: a. b. c. d. e.

Asynchronous Manchester Analog Multimode Amplitude Modulation Anomaly Multiplexing Analytical Mosaic

Answer: c Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

41. In which type of modulation is a 1 distinguished from a 0 by shifting the direction in which the wave begins? a. b. c. d. e.

bandwidth modulation amplitude modulation frequency modulation phase modulation codec modulation

Answer: d Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

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42. When sending four bits at a time using frequency modulation, the number of different frequency levels that would be needed would be _______. a. b. c. d. e.

24 16 2 8 4

Answer: b Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

43. ____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol. a. b. c. d. e.

Quadrature amplitude modulation Time division multiplexing Synchronous digital line control Pulse code modulation Baseband signaling

Answer: Difficulty: Reference: L.O.:

a Medium Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

44. The _____________ of a circuit determines a circuit’s capacity. a. b. c. d. e.

frequency bandwidth phase amplitude loudness

Answer: b Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

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45. The typical range of human hearing is: a. b. c. d. e.

20 to 4,000 Hz 0 to 1,200 Hz 20 to 14,000 Hz 0 to 300 Hz 0 to 56,000 Hz

Answer: c Difficulty: Easy Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

46. If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz, the bandwidth available for this circuit is: a. b. c. d. e.

890 Hz 8900 HZ 9100 Hz 9Khz 890 KHz

Answer: c Difficulty: Hard Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data 47. To get more “bandwidth” in a digital transmission, you must: a. b. c. d. e.

increase the range of frequencies available for a transmission increase the loudness per transmission decrease the bits per second transmission speed increase the phase shifts per transmission decrease the baud rate per transmission

Answer: a Difficulty: Medium Reference: Analog Transmission of Digital Data L.O.: Understand Analog Transmission of Digital Data

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48. Which of the following statements is true? a. The longer the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire. b. The shorter the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire. c. Bandwidth is constant across any wire, therefore distance is not relevant to its capacity. d. The longer the distance of a telephone wire between sender and recipient, the higher the bandwidth across that wire. e. Bandwidth is not a term that can be used when discussing telephone transmissions.

Answer: Difficulty: Reference: L.O.:

c Hard Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

49. The acronym, MODEM, stands for _________________. a. b. c. d. e.

multiplexing/demultiplexing more/demote Mode-M technique modulator/demodulator Mod emulation technique

Answer: Difficulty: Reference: L.O.:

d Easy Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

50. ______ is a modem standard that uses Lempel-Ziv encoding to compress data. a. b. c. d. e.

V.22 V.44 V.32bis V.34 RS 232

Answer: Difficulty: Reference: L.O.:

b Medium Analog Transmission of Digital Data Understand Analog Transmission of Digital Data

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51. Equipment used to transform analog voice signals to digital signals and digital signals to analog signals. a. b. c. d. e.

voice converter modem codec multiplexer demodulator

Answer: Difficulty: Reference: L.O.:

c Medium Digital Transmission of Analog Data Understand digital transmission of analog data

52. _____________ refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog data to digital signals. a. b. c. d. e.

Quantizing error Handshaking phase Modulating frequency POTS anomaly Amplitude Trellis effect

Answer: Difficulty: Reference: L.O.:

a Medium Digital Transmission of Analog Data Understand digital transmission of analog data

53. When converting analog voice data to digital signals, Pulse Code Modulation typically samples the incoming voice signal _______ times per second. a. b. c. d. e.

8,000 8 18,000 64 256

Answer: Difficulty: Reference: L.O.:

a Medium Digital Transmission of Analog Data Understand digital transmission of analog data

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54. How many bits are required to sample an incoming signal 4000 times per second using 64 different amplitude levels? a. b. c. d. e.

64 32 16 8 6

Answer: Difficulty: Reference: L.O.:

e Medium Digital Transmission of Analog Data Understand digital transmission of analog data

55. If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is? a. b. c. d. e.

128 Kbps 64 Kbps 12800 bps 96 Kbps 32000 bps

Answer: Difficulty: Reference: L.O.:

a Medium Digital Transmission of Analog Data Understand digital transmission of analog data

56. A(n) ___________ divides one high-speed communication circuit into several lower speed circuits for the primary reason of saving communication line costs. a. b. c. d. e.

transponder multiplexer inverse multiplexer codec intelligent terminal

Answer: Difficulty: Reference: L.O.:

b Medium Circuits Be familiar with multiplexing

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57. ____________ is used by IM and other applications that provide voice services over lower-speed digital circuits. a. b. c. d. e.

Pulse code modulation Adaptive differential pulse code modulation Voice conversation Code modulation Phase modulation

Answer: Difficulty: Reference: L.O.:

b Medium Digital Transmission of Analog Data Understand digital transmission of analog data

58. The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is a: a. b. c. d. e.

wavelength division multiplexer time division multiplexer statistical time division multiplexer frequency division multiplexer statistical frequency division multiplexer

Answer: Difficulty: Reference: L.O.:

a Medium Circuits Be familiar with multiplexing

59. Frequency division multiplexing: a. b. c. d. e.

operates by statistically time slicing the signal operates by dividing the signal into different frequencies uses a codec that divides signals into different channels operates by time slicing the signal operates by light dividing the signal

Answer: Difficulty: Reference: L.O.:

b Easy Circuits Be familiar with multiplexing

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60. Time (non-statistical) division multiplexing differs from frequency division multiplexing because it: a. does not share a communication circuit b. splits the communication circuit vertically (with time slots) instead of horizontally c. increases the wavelength and phase angles of the baseband frequency used for transmission d. moves the baseband of a circuit by shifting it to a higher frequency e. reduces baseband signal velocity more than frequency division multiplexing Answer: Difficulty: Reference: L.O.:

b Medium Circuits Be familiar with multiplexing

61. A _________ is an FDM device that splits the physical circuit into three logical circuits (phone, upstream data, and downstream data). a. b. c. d. e.

DSL modem cable modem wireless router V.44 modem Serial modem

Answer: Difficulty: Reference: L.O.:

a Medium Circuits Be familiar with multiplexing

62. When you send an email from the US to Europe, it likely is transmitted from one continent to another through one of the ______ that connect America and Europe. a. b. c. d. e.

submarine cables satellites telephone lines boats modems

Answer: Difficulty: Reference: L.O.:

a Easy Circuits Be familiar with the different types of network circuits and media

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63. The room that contains the cable termination points and the distribution frames is referred to as a. b. c. d. e.

telecommunications closet equipment room building entrance backbone room work area

Answer: Difficulty: Reference: L.O.:

a Medium Circuits Be familiar with the different types of network circuits and media

64. Ethernet uses a. b. c. d. e.

Manchester encoding Unipolar signaling Bipolar return to zero signaling Bipolar nonreturn to zero signaling Manchester return to zero signaling

Answer: Difficulty: Reference: L.O.:

a Medium How Ethernet Transmits Data Be familiar with the different types of network circuits and media

65. ___________ is commonly used to transmit phone conversations over digital networks. a. b. c. d. e.

VOIP Ethernet Intranet Pulse code modulation Infrared

Answer: Difficulty: Reference: L.O.:

a Medium Voice Over Internet Protocol Be familiar with the different types of network circuits and media

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Chapter 4 Data Link Layer True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. Media access controls refer to the need to control when computers transmit.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Understand the role of the data link layer

2. The data link layer accepts messages from the network layer and controls the hardware that transmits them.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the role of the data link layer

3. Only the sender of a data transmission needs to be concerned about the rules or protocols that govern how it communicates with the receiver.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the role of the data link layer

4. Most computer networks managed by a host mainframe computer tend to use a form of media access control called contention.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

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5. Polling is the process of permitting all clients to transmit or receive at any time.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

6. With roll-call polling, a server polls clients in a consecutive, pre-arranged priority list.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

7. Token passing is a term that refers to hub polling, in which one computer starts a poll and passes it to the next computer on a multipoint circuit.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

8. With contention, a computer does not have to wait before it can transmit. A computer can transmit at any time.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

9. Contention is widely used with Ethernet local area networks.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

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10. Controlled access MAC approaches work well in a large network with high usage.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

11. There are three commonly used controlled access techniques: access requests, access demands, and polling.

Answer: Difficulty: Reference: L.O.:

False Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

12. The two categories of network errors are lost data and delimited data.

Answer: Difficulty: Reference: L.O.:

False Easy Error Control Become familiar with common sources of error and their prevention

13. If a computer transmits a message containing “ABC” and the destination computer receives “abc” as the message, the message is corrupted.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Become familiar with common sources of error and their prevention

14. Data transmission errors typically are distributed uniformly in time.

Answer: Difficulty: Reference: L.O.:

False Easy Error Control Become familiar with common sources of error and their prevention

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15. Undesirable stray electrical voltage can cause data communication errors.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Become familiar with common sources of error and their prevention

16. Gaussian noise is a special type of attenuation.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Become familiar with common sources of error and their prevention

17. The thermal agitation of electrons causes impulse noise.

Answer: Difficulty: Reference: L.O.:

False Easy Error Control Become familiar with common sources of error and their prevention

18. Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Become familiar with common sources of error and their prevention

19. Attenuation refers to the loss of signal strength.

Answer: Difficulty: Reference: L.O.:

True Easy Error Control Become familiar with common sources of error and their prevention

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20. When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal, this is called intermodulation noise.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Become familiar with common sources of error and their prevention

21. The physical and data link layers of wired Ethernet have been refined over the years as a collection of standards under the IEEE 802.3 workgroup.

Answer: Difficulty: Reference: L.O.:

True Easy Data Link Protocols Become familiar with several commonly used data link protocols

22. The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Become familiar with common sources of error and their prevention

23. When we amplify the signal on an analog circuit, we also amplify any noise that is present on the circuit.

Answer: Difficulty: Reference: L.O.:

True Easy Error Control Become familiar with common sources of error and their prevention

24. For effective error detection and correction, extra error detection “data” must be included with each message Answer: Difficulty: Reference: L.O.:

True Medium Error Control Become familiar with common sources of error and their prevention

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25. In an odd parity-checking scheme, the parity bit is set to make the total number of ones in the byte (including the parity bit) an even number.

Answer: Difficulty: Reference: L.O.:

False Easy Error Control Become familiar with common sources of error and their prevention

26. Parity checking can only detect an error when an even number of bits are switched.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Become familiar with common sources of error and their prevention

27. Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

Answer: Difficulty: Reference: L.O.:

True Easy Error Control Become familiar with common sources of error and their prevention

28. The simplest method for error correction is retransmission.

Answer: Difficulty: Reference: L.O.:

True Easy Error Control Become familiar with common sources of error and their prevention

29. Another term for continuous ARQ is sliding window.

Answer: Difficulty: Reference: L.O.:

False Easy Error Control Become familiar with common sources of error and their prevention

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30. One type of forward error correction is the Hamming code.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Understand three common error detection and correction methods

31. Forward error correction is commonly used in satellite transmission.

Answer: Difficulty: Reference: L.O.:

True Easy Error Control Understand three common error detection and correction methods

32. HDLC is very similar to the SDLC synchronous data link protocol.

Answer: Difficulty: Reference: L.O.:

True Medium Data Link Protocols Become familiar with several commonly used data link protocols

33. Overhead bits are used for error checking and marking the start and end of characters and packets.

Answer: Difficulty: Reference: L.O.:

True Easy Transmission Efficiency Understand the role of the data link layer

34. Transmission efficiency refers to the percentage of bits transmitted without errors.

Answer: Difficulty: Reference: L.O.:

False Medium Transmission Efficiency Understand the role of the data link layer

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35. The data link layer accepts streams of bits from the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the role of the data link layer

36. The data link layer is responsible for encoding the bit-stream as a series of electronic voltages.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the role of the data link layer

37. The data link layer performs error detection.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the role of the data link layer

38. The data link layer performs routing functions.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the role of the data link layer

39. The data link layer organizes data from the physical layer and passes these coherent messages directly to the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the role of the data link layer

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40. Media access control is not very important in point-to-point with full duplex configuration.

Answer: Difficulty: Reference: L.O.:

True Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

41. Media access control is not very important in local area networks.

Answer: Difficulty: Reference: L.O.:

False Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

42. Media access control is not very important in a point-to-point with a half-duplex configuration.

Answer: Difficulty: Reference: L.O.:

False Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

43. Media access control is not very important in a multipoint configuration.

Answer: Difficulty: Reference: L.O.:

False Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

44. Media access control does not control when computers transmit.

Answer: Difficulty: Reference: L.O.:

False Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

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45. Roll call polling cannot be modified to increase priority of clients or terminals.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

46. Roll call polling does not require a server, host, or special device that performs the polling.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

47. Roll call polling is also called token passing.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

48. Roll call polling is a type of contention approach to media access control.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

49. Roll call polling typically involves some waiting because the server has to wait for a response from the polled client or terminal.

Answer: Difficulty: Reference: L.O.:

True Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

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50. In general, controlled approaches work better than contention approaches for small networks that have low usage.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

51. In general, controlled approaches work better than contention approaches for large networks that have high usage.

Answer: Difficulty: Reference: L.O.:

True Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

52. In general, controlled approaches work better than contention approaches for all sizes of networks.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

53. In general, controlled approaches do not require a host, server, or active monitor to assign media access control.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

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54. In general, controlled approaches have many collisions.

Answer: Difficulty: Reference: L.O.:

False Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

55. Using parity, the probability for detecting an error, given that one has occurred, is about 50% for either even or odd parity.

Answer: Difficulty: Reference: L.O.:

True Medium Error Control Understand three common error detection and correction methods

56. Using parity, the probability for detecting an error, given that one has occurred, is about 25% for either even or odd parity.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Understand three common error detection and correction methods

57. Using parity, the probability for detecting an error, given that one has occurred, is about 70% for even parity and 30% for odd parity.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Understand three common error detection and correction methods

58. Using parity, the probability for detecting an error, given that one has occurred, is about 30% for even parity and 70% for odd parity.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Understand three common error detection and correction methods

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59. Using parity, the probability for detecting an error, given that one has occurred, is about 20% for either even or odd parity.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Understand three common error detection and correction methods

60. Using parity, the probability for detecting an error, given that one has occurred, is about 100% for either even or odd parity.

Answer: Difficulty: Reference: L.O.:

False Medium Error Control Understand three common error detection and correction methods

61. Synchronous transmission cannot be used on multipoint circuits.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

62. Synchronous transmission is used to send one character at a time.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

63. Synchronous transmission uses start bits before each character to be sent.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

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64. Synchronous transmission uses stop bits after each character to be sent.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

65. Synchronous transmission is used to transmit a “frame” or “packet” of data at a time.

Answer: Difficulty: Reference: L.O.:

True Medium Data Link Protocols Become familiar with several commonly used data link protocols

66. The data link protocol SDLC is a client-server protocol developed by Compaq in 1996.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

67. The data link protocol SDLC transmits each character independently of one another and includes start and stop bits for each character sent.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

68. The data link protocol SDLC uses a special bit pattern called a flag at the beginning and end of every frame (or packet).

Answer: Difficulty: Reference: L.O.:

True Medium Data Link Protocols Become familiar with several commonly used data link protocols

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69. The data link protocol SDLC does not have any error detection capabilities.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

70. The data link protocol SDLC It uses a contention media access control protocol and is used in most LANs today.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

71. The data link protocol, Ethernet (IEEE 802.3) is not very popular.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

72. The data link protocol, Ethernet (IEEE 802.3) is a bit-oriented protocol.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

73. The data link protocol, Ethernet (IEEE 802.3) uses block check characters for error detection.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

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74. Regarding the data link protocol, Ethernet (IEEE 802.3), newer version permits jumbo frames.

Answer: Difficulty: Reference: L.O.:

True Medium Data Link Protocols Become familiar with several commonly used data link protocols

75. The data link protocol, Ethernet (IEEE 802.3) uses parity bits for error detection.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

76. The data link protocol, PPP is commonly used in WANs. Answer: Difficulty: Reference: L.O.:

True Medium Data Link Protocols Become familiar with several commonly used data link protocols

77. The data link protocol, PPP is a bit-oriented protocol.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

78. The data link protocol, PPP uses block check characters for error detection.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

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79. The data link protocol, PPP was developed in the 1960s.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

80. The data link protocol, PPP uses parity bits for error detection.

Answer: Difficulty: Reference: L.O.:

False Medium Data Link Protocols Become familiar with several commonly used data link protocols

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Multiple Choice The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. As part of the five-layer network model used in this textbook, the data link layer sits directly between: a. b. c. d. e.

the physical and the application layers the network and the application layers the network and transport layers the physical and the application layers the physical and the network layers

Answer: Difficulty: Reference: L.O.:

e Easy Introduction Understand the role of the data link layer

2. Which of the following is true with respect to the data link layer? a. b. c. d. e.

It accepts streams of bits from the application layer.

It is responsible for encoding the bit-stream as a series of electronic voltages.

It performs error detection.

It performs routing functions.

It organizes data from the physical layer and passes these coherent messages directly to the application layer.

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Understand the role of the data link layer

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3. ____________ is not a function of a data link protocol. a. b. c. d. e.

Media access control Message delineation Amplitude shift keying Indicating when a message starts and stops Error control

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Understand the role of the data link layer

4. Media access control: a. b. c. d. e.

is not very important in point-to-point with full duplex configuration. is not very important in local area networks. is not very important in a point-to-point with a half-duplex configuration. is not very important in a multipoint configuration. does not control when computers transmit.

Answer: Difficulty: Reference: L.O.:

a Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

5. Which of the following is not a controlled access method of media access control? a. b. c. d. e.

Token passing CSMA/CD polling roll call polling hub polling

Answer: Difficulty: Reference: L.O.:

b Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

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6. ________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive. a. b. c. d. e.

Contention Polling Pooling Carrier sense CRC

Answer: Difficulty: Reference: L.O.:

b Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

7. Which of the following is true about roll call polling? a. b. c. d. e.

It cannot be modified to increase priority of clients or terminals.

It does not require a server, host, or special device that performs the polling.

It is also called token passing.

It is a type of contention approach to media access control.

It typically involves some waiting because the server has to wait for a response from the polled client or terminal.

Answer: Difficulty: Reference: L.O.:

e Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

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8. With contention: a. computers wait until the circuit is free before they send data b. the server or front end processor works consecutively through a list of clients to determine who should have access to the media c. the front end processor must wait for a response from the polled client or terminal d. one computer starts the poll and passes it to the next computer on the multipoint circuit e. there is never a chance for “collision,” or two computers trying to send data at the same time Answer: Difficulty: Reference: L.O.:

a Easy Media Access Control Become familiar with two basic approaches to controlling access to the media

9. In general, controlled approaches: a. b. c. d. e.

work better than contention approaches for small networks that have low usage. work better than contention approaches for large networks that have high usage. work better than contention approaches for all sizes of networks. do not require a host, server, or active monitor to assign media access control. have many collisions.

Answer: Difficulty: Reference: L.O.:

b Medium Media Access Control Become familiar with two basic approaches to controlling access to the media

10. In a _________, more than one data bit is changed by the error-causing condition. a. b. c. d. e.

burst error data rate shift Trellis-coded modulation uniform distribution amplitude key shift

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

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11. Errors on a network can occur: a. b. c. d. e.

only on dial-up type of circuits. because of noise on the line. only on poorly maintained networks. only due to Gaussian noise. only due to lightning strikes.

Answer: Difficulty: Reference: L.O.:

b Medium Error Control Understand three common error detection and correction methods

12. The two sublayers of the data link layer consist of the media access control sublayer and the________. a. b. c. d. e.

logical link control sublayer network control sublayer session sublayer physical sublayer transport sublayer

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Understand the role of the data link layer

13. Which of the following media is least susceptible to noise? a. b. c. d. e.

fiber optic cable coaxial cable twisted pair unshielded twisted pair shielded twisted pair

Answer: Difficulty: Reference: L.O.:

a Easy Error Control Understand three common error detection and correction methods

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14. Optical media is: a. b. c. d. e.

more likely to suffer from noise than electrical media. has about the same likelihood of suffering from noise as electrical media. has about the same likelihood of suffering from noise as coaxial cable. less likely to suffer from noise than electrical media. more prone to noise than twisted pair media.

Answer: Difficulty: Reference: L.O.:

d Medium Error Control Understand three common error detection and correction methods

15. ____________ refers to bits that have been changed, in error, from 1 to 0, or vice versa, in a data transmission. a. b. c. d. e.

Contracted bits Polled bits Inverse multiplexed bits Flipped bits Bit delineation

Answer: Difficulty: Reference: L.O.:

d Medium Error Control Understand three common error detection and correction methods

16. Another term for impulse noise is: a. b. c. d. e.

Gaussian noise spikes attenuation cross-talk intermodulation noise

Answer: Difficulty: Reference: L.O.:

b Medium Error Control Understand three common error detection and correction methods

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Chapter 4 Test Bank

17. The familiar background static on radios and telephones is called: a. b. c. d. e.

echoes intermodulation noise gray noise cross-talk white noise

Answer: Difficulty: Reference: L.O.:

e Medium Error Control Understand three common error detection and correction methods

18. The primary source of error in data communications is: a. b. c. d. e.

echoes. intermodulation noise. spikes. attenuation. cross-talk.

Answer: Difficulty: Reference: L.O.:

c Medium Error Control Understand three common error detection and correction methods

19. __________can obliterate a group of bits, causing a burst error. a. b. c. d. e.

Cross-talk Attenuation Impulse noise Intermodulation noise Gray noise

Answer: Difficulty: Reference: L.O.:

c Medium Error Control Understand three common error detection and correction methods

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20. Cross-talk: a. b. c. d. e.

occurs when one circuit picks up signals in another. is always bothersome because it has a high signal strength. decreases with increased proximity of two wires. decreases during wet or damp weather. increases with lower frequency signals.

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

21. When a signal is reflected back to the transmitting equipment, it is called a(n) _________. a. b. c. d. e.

white noise echo crosstalk attenuation impulse noise

Answer: Difficulty: Reference: L.O.:

b Medium Error Control Understand three common error detection and correction methods

22. The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is _____. a. b. c. d. e.

white noise spiking attenuation intermodulation noise echo

Answer: c Difficulty: Medium Reference: Error Control L.O.: Understand three common error detection and correction methods

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23. If a signal with a frequency of 500 MHz combines with another signal of 1500 MHz and they form a new signal of 2000 MHz, this is an example of: a. b. c. d. e.

intermodulation noise attenuation echo white noise cross-talk

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

24. _____________ is an effective way to prevent impulse noise, cross talk, and intermodulation noise. a. b. c. d. e.

Shielding wires Adding fluorescent lights Adding repeaters to a circuit Adding amplifiers to a circuit Shorting a circuit

Answer: Difficulty: Reference: L.O.:

a Easy Error Control Understand three common error detection and correction methods

25. _____________ is an effective way to prevent attenuation. a. b. c. d. e.

Shielding wires Adding fluorescent lights Adding repeaters or amplifiers to a circuit Changing multiplexing techniques Shorting a circuit

Answer: Difficulty: Reference: L.O.:

c Medium Error Control Understand three common error detection and correction methods

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26. Which of the following is way to reduce or eliminate crosstalk on a circuit? a. b. c. d. e.

Physically separating the cables from other communication cables Adding repeaters or amplifiers to a circuit Reducing the length of the cable Adding fluorescent lights Shorting a circuit

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

27. On digital circuits, we use _________ to reshape the incoming signal and prevent attenuation. a. b. c. d. e.

amplifiers repeaters multiplexers digitizers modems

Answer: Difficulty: Reference: L.O.:

b Medium Error Control Understand three common error detection and correction methods

28. Which of the following is not an error detection method used in the data link layer? a. b. c. d. e.

Parity checking Cyclic redundancy checking CRC-32 Pulse code checking Odd parity

Answer: Difficulty: Reference: L.O.:

d Medium Error Control Understand three common error detection and correction methods

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29. With odd parity (assume that the parity bit (in bold) has been placed at the end of each of the following) and a 7-bit ASCII code, which of the following is incorrect? a. b. c. d. e.

01101011 00011011 00100101 10110110 11111110

Answer: Difficulty: Reference: L.O.:

b Medium Error Control Understand three common error detection and correction methods

30. The probability of detecting an error, given that one has occurred, using parity checking is about: a. b. c. d. e.

0% 50% 75% 98% 100%

Answer: Difficulty: Reference: L.O.:

b Easy Error Control Understand three common error detection and correction methods

31. Using parity, the probability for detecting an error, given that one has occurred, is: a. b. c. d. e.

about 50% for either even or odd parity. about 70% for even parity and 30% for odd parity. about 30% for even parity and 70% for odd parity. about 0% for either even or odd parity. about 100% for either even or odd parity.

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

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32. The probability of detecting an error, provided that one has occurred, using cyclic redundancy checking is about: a. b. c. d. e.

0% 75% 50% > 99% exactly 100%

Answer: Difficulty: Reference: L.O.:

d Easy Error Control Understand three common error detection and correction methods

33. ARQ means that: a. a receiver that detects an error in a message simply asks the sender to retransmit the message until it is received without error b. the common carrier Automatically Returns Queries to the subscriber upon receipt of such queries c. a sender is using a data link protocol called Asynchronous Repeating reQuest d. a fiber optic cable meets the American Registered Quality, a certification standard for use in high-quality data communication transmission lines e. a sender is using a parity scheme called Array Resource Quality Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

34. In ARQ, a NAK: a. b. c. d. e.

is sent by the recipient if the message was received without error is sent by the sender at the same time as it sends a data packet is sent by the recipient if the message contains an error refers to non-asynchronous Kermit technique means that the sender should continue with sending the next message

Answer: Difficulty: Reference: L.O.:

c Medium Error Control Understand three common error detection and correction methods

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35. ________ has essentially replaced SDLC. It offers a larger sliding window. a. b. c. d. e.

Ethernet PPP Asynchronous transmission HDLC Full complex

Answer: Difficulty: Reference: L.O.:

d Medium Data Link Protocols Become familiar with several commonly used data link protocols

36. With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data. a. b. c. d. e.

open window halt and be recognized (HBR) sliding window stop and wait continuous

Answer: Difficulty: Reference: L.O.:

d Medium Error Control Understand three common error detection and correction methods

37. With __________ ARQ, the sender immediately sends the next message or packet of data. a. b. c. d. e.

continuous immediate open window stop-and-wait halt and be recognized (HBR)

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

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38. ______________ controls errors by detecting and correcting them at the receiving end without retransmission of the original message. a. b. c. d. e.

Hamming code Huffman encoding Front end processing Wave division multiplexing Hub polling

Answer: Difficulty: Reference: L.O.:

a Medium Error Control Understand three common error detection and correction methods

39. Asynchronous transmission: a. b. c. d. e.

is used to transmit each character simultaneously with all other characters has a pre-determined, fixed time between sending characters is typically used on multipoint half duplex circuits uses a continuous series of start bits as an idle signal each character is transmitted independently of all other characters

Answer: Difficulty: Reference: L.O.:

e Medium Data Link Protocols Become familiar with several commonly used data link protocols

40. Which of the following is not a type of synchronous protocol? a. b. c. d. e.

SDLC VT100 HDLC Ethernet PPP

Answer: Difficulty: Reference: L.O.:

b Medium Data Link Protocols Become familiar with several commonly used data link protocols

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41. Synchronous transmission: a. b. c. d. e.

cannot be used on multipoint circuits. is used to send one character at a time. uses start bits before each character to be sent. uses stop bits after each character to be sent. is used to transmit a “frame” or “packet” of data at a time.

Answer: Difficulty: Reference: L.O.:

e Medium Data Link Protocols Become familiar with several commonly used data link protocols

42. Which of the following is true about the data link protocol, SDLC: a. It is a client-server protocol developed by Compaq in 1996. b. It transmits each character independently of one another and includes start and stop bits for each character sent. c. It uses a special bit pattern called a flag at the beginning and end of every frame (or packet). d. It uses a contention media access control protocol and is used in most LANs today. e. It does not have any error detection capabilities.

Answer: Difficulty: Reference: L.O.:

c Medium Data Link Protocols Become familiar with several commonly used data link protocols

43. Which of the following is true about the data link protocol, Ethernet (IEEE 802.3)? a. b. c. d. e.

It is not very popular.

It is a bit-oriented protocol. it uses block check characters for error detection.

Newer version permits jumbo frames.

It uses parity bits for error detection.

Answer: Difficulty: Reference: L.O.:

d Medium Data Link Protocols Become familiar with several commonly used data link protocols

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44. Which of the following is true about the data link protocol, PPP? a. b. c. d. e.

It is commonly used in WANs. It is a bit-oriented protocol.

It uses block check characters for error detection.

It was developed in the 1960s.

It uses parity bits for error detection.

Answer: Difficulty: Reference: L.O.:

a Medium Data Link Protocols Become familiar with several commonly used data link protocols

45. In communication protocols, _________ are used to convey the user’s meaning. a. b. c. d. e.

information bits overhead bits stop bits start bits flag bits

Answer: Difficulty: Reference: L.O.:

a Medium Data Link Protocols Become familiar with several commonly used data link protocols

46. _________________ is defined as the total number of information bits divided by the total number of bits in the transmission. a. b. c. d. e.

Asynchronous rate Protocol percentage Throughput Transmission Rate of Information Bits Transmission efficiency

Answer: Difficulty: Reference: L.O.:

e Medium Transmission Efficiency Understand the role of the data link layer

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47. Calculating the actual throughput of a data communication network is: a. b. c. d. e.

not normally required for synchronous networks because they are so fast complex because many factors affect throughput simple because packet size is the primary factor affecting throughput not needed for satellite-based networks far less complicated if the system operates on a contention basis

Answer: Difficulty: Reference: L.O.:

b Easy Transmission Efficiency Understand the role of the data link layer

48. The data link layer uses the ________ to recognize the source and destination addresses. a. b. c. d. e.

MAC address IP address URL Email address Local router

Answer: Difficulty: Reference: L.O.:

a Easy Implications for Cyber Security Understand the role of cyber security

49. __________ is a software-enabled technique that can change the hardcoded MAC address to any MAC address and thus overcome MAC address filtering. a. b. c. d. e.

MAC address spoofing MAC address engaging Ethernet address regeneration Address regeneration MAC address cheesing

Answer: Difficulty: Reference: L.O.:

a Easy Implications for Cyber Security Understand the role of cyber security

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Chapter 5 Network and Transport Layers True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. TCP/IP is a data link protocol that is used on the Internet.

Answer: Difficulty: Reference: L.O.:

False Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

2. The network layer sits directly between the application layer and the data link layer in the Internet five-layer network model.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

3. The network layer provides guaranteed end-to-end delivery of the message.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

4. The transport layer routes messages through the network selecting the best path from the source to the destination station.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

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5. The transport layer process running on the destination computer, reassembles the fragmented application message before passing it up to the application layer Answer: Difficulty: Reference: L.O.:

True Medium Introduction Be familiar with linking to the application layer, segmenting, and session management

6. TCP is the network layer protocol used on the Internet today.

Answer: Difficulty: Reference: L.O.:

False Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

7. IP is responsible for error-free delivery of packets on a TCP/IP network.

Answer: Difficulty: Reference: L.O.:

False Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

8. The TCP portion of TCP/IP performs linking to the application layer.

Answer: Difficulty: Reference: L.O.:

True Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

9. The source port identifier in the TCP header tells the TCP software on the destination computer, which application on the destination it should pass the packet to.

Answer: Difficulty: Reference: L.O.:

False Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

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10. TCP includes a sequence number so that the packets can be reassembled at the destination in the correct order.

Answer: Difficulty: Reference: L.O.:

True Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

11. The latest version of IP is IPv7, which increases the address space from 128 bits to 256 bits.

Answer: Difficulty: Reference: L.O.:

False Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

12. A destination port number at the transport layer identifies which application on a computer should receive the data transmission.

Answer: Difficulty: Reference: L.O.:

True Medium Transport Layer Functions Be aware of the TCP/IP protocols

13. Source port address is the logical address used to identify the application that is sending the data.

Answer: Difficulty: Reference: L.O.:

True Easy Transport Layer Functions Be aware of the TCP/IP protocols

14. The standard port number for Telnet is 53.

Answer: Difficulty: Reference: L.O.:

False Easy Transport Layer Functions Be familiar with addressing

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15. Because there is a limit on the length of a frame that the data link layer can transmit from node to node, the transport layer breaks up the message from the application layer into several smaller segments.

Answer: Difficulty: Reference: L.O.:

True Medium Transport Layer Functions Be aware of the TCP/IP protocols

16. Connectionless routing sets up a TCP connection, or virtual circuit between a sender and receiver.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be aware of the TCP/IP protocols

17. TCP/IP operates only as connection-oriented.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be aware of the TCP/IP protocols

18. Quality of Service routing is a special type of routing in which different connections are assigned different priorities.

Answer: Difficulty: Reference: L.O.:

True Easy Transport Layer Functions Be familiar with routing

19. An example of an application layer address is www.indiana.edu.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

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20. The network layer address for IP is ten bytes long when using IPv4.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

21. The data link layer address is generally encoded in a network card by the card’s manufacturer.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

22. IPv4 addresses offer unlimited opportunity for expansion and growth on the Internet.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

23. Subnet masks tell computers what part of an IP address is to be used to determine whether a destination is in the same subnet or in a different subnet.

Answer: Difficulty: Reference: L.O.:

True Medium Addressing Be familiar with addressing

24. The most common protocol for dynamic addressing in TCP/IP networks is the Dynamic Host Configuration Protocol.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

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25. Translating an application layer address to a network layer address and finally to a data link layer address is called address resolution.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

26. Part of the function of address resolution is translating the application layer address of the destination into a network layer address.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

27. Domain Name Servers provide the resolution of application layer addresses to their corresponding network layer address.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

28. An Address Resolution Protocol message is broadcast to all computers in a subnet to find the data link layer address of a host whose IP address is known but whose MAC address is unknown.

Answer: Difficulty: Reference: L.O.:

True Medium Addressing Be familiar with addressing

29. Routing is the process of determining the path or route through the network that a particular message will follow from the sender to the recipient.

Answer: Difficulty: Reference: L.O.:

True Easy Routing Be familiar with routing

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30. There are four fundamental approaches to routing: dynamic routing, and monitor routing.

Answer: Difficulty: Reference: L.O.:

centralized, static routing,

False Medium Routing Be familiar with routing

31. When using dynamic routing, routing decisions are always made by a central host or server.

Answer: Difficulty: Reference: L.O.:

False Easy Routing Be familiar with routing

32. A hop in a routing calculation is defined as one link or circuit.

Answer: Difficulty: Reference: L.O.:

True Easy Routing Be familiar with routing

33. An autonomous system is a network operated by one organization.

Answer: Difficulty: Reference: L.O.:

True Easy Routing Be familiar with routing

34. A routing protocol used inside an autonomous system is called an exterior routing protocol.

Answer: Difficulty: Reference: L.O.:

False Easy Routing Be familiar with routing

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35. The Enhanced Interior Gateway Routing Protocol is an interior routing protocol originally developed by Cisco.

Answer: Difficulty: Reference: L.O.:

True Medium Routing Be familiar with routing

36. A multicast message can be used to send a message to a maximum of two other computers.

Answer: Difficulty: Reference: L.O.:

False Medium Routing Be familiar with routing

37. Connections on a router, to the Internet and other routers for example, are called applications.

Answer: Difficulty: Reference: L.O.:

False Easy Routing Be familiar with routing

38. Another term for stop-and-wait ARQ is sliding window.

Answer: Difficulty: Reference: L.O.:

False Easy Session Management Be familiar with linking to the application layer, segmenting, and session management

39. HTTP is not a protocol used at the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

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40. SMTP is not a protocol used at the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

41. FTP is not a protocol used at the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

42. Telnet is not a protocol used at the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

43. UDP is not a protocol used at the application layer.

Answer: Difficulty: Reference: L.O.:

True Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

44. A subnet mask of 11111111.0.0.0 means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet.

Answer: Difficulty: Reference: L.O.:

False Medium Addressing Be familiar with addressing

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45. A subnet mask of 255.255.255.255 means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet.

Answer: Difficulty: Reference: L.O.:

False Medium Addressing Be familiar with addressing

46. A subnet mask of 255.255.255.0 means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet.

Answer: Difficulty: Reference: L.O.:

False Medium Addressing Be familiar with addressing

47. A subnet mask of 255.0.0.0 means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet.

Answer: Difficulty: Reference: L.O.:

False Medium Addressing Be familiar with addressing

48. A subnet mask of 255.255.0.0 means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet.

Answer: Difficulty: Reference: L.O.:

False Medium Addressing Be familiar with addressing

49. The three fundamental approaches to routing are circuitous, flat, and direct routing.

Answer: Difficulty: Reference: L.O.:

False Medium Routing Be familiar with routing

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50. The three fundamental approaches to routing are connectionless, static, and connection-oriented.

Answer: Difficulty: Reference: L.O.:

False Medium Routing Be familiar with routing

51. The three fundamental approaches to routing are subordinate, master, and insubordinate routing.

Answer: Difficulty: Reference: L.O.:

False Medium Routing Be familiar with routing

52. The three fundamental approaches to routing are host, client, and client-server routing.

Answer: Difficulty: Reference: L.O.:

False Medium Routing Be familiar with routing

53. The three fundamental approaches to routing are centralized, static routing, and dynamic routing.

Answer: Difficulty: Reference: L.O.:

True Medium Routing Be familiar with routing

54. Circuitous routing is a type of dynamic routing.

Answer: False Difficulty: Easy Reference: Routing L.O.: Be familiar with routing

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55. Centralized routing is a type of dynamic routing.

Answer: False Difficulty: Easy Reference: Routing L.O.: Be familiar with routing

56. Link state is a type of dynamic routing.

Answer: True Difficulty: Easy Reference: Routing L.O.: Be familiar with routing

57. X.25 routing is a type of dynamic routing.

Answer: False Difficulty: Easy Reference: Routing L.O.: Be familiar with routing

58. IP addresses from 224 to 239 belong to Class D and are reserved for multicasting.

Answer: Difficulty: Reference: L.O.:

True Easy Addressing Be familiar with addressing

59. IP addresses from 224 to 239 belong to Class D and are reserved for education.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

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60. IP addresses from 224 to 239 belong to Class D and are reserved for the government.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

61. IP addresses from 224 to 239 belong to Class D and are reserved for international firms.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

62. IP addresses from 224 to 239 belong to Class D and are reserved for private networks.

Answer: Difficulty: Reference: L.O.:

False Easy Addressing Be familiar with addressing

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. The ____________ layer links the application layer with the network layer is responsible for end-to-end delivery of messages. a. b. c. d. e.

physical transport session presentation data link

Answer: Difficulty: Reference: L.O.:

b Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

2. __________ is not an important function of the transport layer. a. b. c. d. e.

End-to-end delivery of the message Taking messages from the application layer Routing Breaking long messages into smaller segments Interfacing with the network layer

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Be familiar with linking to the application layer, segmenting, and session management

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3. _______ is the dominant network protocol today and is in use in virtually every LAN and WAN in the world. a. b. c. d. e.

SDLC SNA IPX/SPX TCP/IP X.25

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

4. Transmission Control Protocol/Internet Protocol was developed for ________ in 1974. a. b. c. d. e.

ARPANET IBM Hewlett-Packard Kennesaw State University Xerox

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with linking to the application layer, segmenting, and session management

5. TCP/IP: a. is the least commonly used network protocol for LANs because it cannot be combined with Ethernet b. performs packetizing, as well as routing and addressing functions c. is not very efficient and is prone to errors d. is compatible with only one type of data link protocol, SDLC e. refers to Telephone Control Procedures/Inter-exchange Procedures Answer: Difficulty: Reference: L.O.:

b Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

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6. A typical TCP segment has a _______ header of control information. a. b. c. d. e.

32-bit 64-bit 120-byte 192-bit 32-byte

Answer: Difficulty: Reference: L.O.:

d Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

7. The source port identifier of the received TCP segment tells the destination station _____________. a. b. c. d. e.

which computer sent the TCP packet. which application layer program that the packet should be sent which application layer process the packet is from. the IP address of the source computer. the IP address of the destination computer.

Answer: Difficulty: Reference: L.O.:

c Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

8. TCP uses _____________ so that the destination station can reassemble the packets into the correct order. a. b. c. d. e.

IP addresses sequence numbers port numbers packet numbers reassembly value

Answer: Difficulty: Reference: L.O.:

b Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

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9. The older version of IP has a ________ header of control information. a. b. c. d. e.

128-bit 192-bit 1024-bit 120-bit 320-bit

Answer: Difficulty: Reference: L.O.:

b Easy Transport and Network Layer Protocols Be aware of the TCP/IP protocols

10. IP: a. b. c. d. e.

performs segmentation of the data does not have a header is currently in use with only one packet form or structure is utilized during routing functions performs error control functions

Answer: Difficulty: Reference: L.O.:

d Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

11. The newer form of IP, version 6 (IPv6): a. b. c. d. e.

Is running out of address space to support the growth of the Internet has a 20 byte header has an increased address size from 32 bits to 128 bits does not include version number in its header does not include hop limit in its header

Answer: Difficulty: Reference: L.O.:

c Medium Transport and Network Layer Protocols Be aware of the TCP/IP protocols

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12. Assume that more than one application program is using the same communications line on a particular computer. To be able to decide to which application program a message should be delivered on this computer, TCP/IP relies on the: a. b. c. d. e.

data link layer address port address application layer address network address IP address

Answer: Difficulty: Reference: L.O.:

b Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

13. The transport layer must break messages from the application layer into several _____ that can be sent to the network layer. a. b. c. d. e.

bits bytes frames segments strings

Answer: Difficulty: Reference: L.O.:

d Easy Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

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14. The negotiation by the transport layer at the sender with the transport layer at the receiver to determine what size packets should be set up is done via establishing a(n) ___________ between the sender and receiver. a. b. c. d. e.

network layer address resolution one way handshake SNA message TCP connection DNS server request

Answer: Difficulty: Reference: L.O.:

d Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

15. A TCP three-way handshake is used to establish a/an ___________ messaging method. a. b. c. d. e.

asynchronous connection-oriented frequency division application net connectionless

Answer: Difficulty: Reference: L.O.:

b Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

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16. With _____________ messaging, each UDP segment makes its own way through the network without the use of sequence numbers or acknowledgements. a. b. c. d. e.

frequency division connection-oriented PCMCIA connectionless application net

Answer: Difficulty: Reference: L.O.:

d Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

17. Which of the following is not a protocol used at the application layer. a. b. c. d. e.

HTTP SMTP FTP Telnet UDP

Answer: Difficulty: Reference: L.O.:

e Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

18. ______________ communication is most commonly used when the application data or message can fit into one single packet. a. b. c. d. e.

Frame-oriented Connection-oriented Connectionless Physical-oriented Byte-oriented

Answer: Difficulty: Reference: L.O.:

c Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

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19. UDP is not commonly used for: a. b. c. d. e.

network management control messages RIP messages DHCP addressing messages HTTP requests DNS requests

Answer: Difficulty: Reference: L.O.:

d Medium Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

20. With QoS routing different __________ are defined, each with different priorities. a. b. c. d. e.

classes of service domain names application layer addresses data link layer addresses classes of Internet addresses

Answer: Difficulty: Reference: L.O.:

a Easy Transport Layer Functions Be familiar with linking to the application layer, segmenting, and session management

21. An application layer address using TCP/IPv4 looks like: a. b. c. d. e.

128.192.78.5 www.cba.uga.edu user@cba.uga.edu 00-0F-00-81-14-00 Building 4, Room 2, User 3

Answer: Difficulty: Reference: L.O.:

b Medium Addressing Be familiar with addressing

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22. A client computer is typically assigned a data link layer address by a: a. b. c. d.

hardware manufacturer software manufacturer middleware manufacturer network manager who configure a file in a computer’s network layer software package e. ISO Answer: Difficulty: Reference: L.O.:

a Medium Addressing Be familiar with addressing

23. ICANN: a. developed the IPX/SPX network layer protocol b. assigns data link layer addresses c. approves which network layer addresses (usually, approved or assigned in groups or classes) can be used by an organization for its computers that will connect to the Internet d. developed X.25 network layer protocol e. refers to Interchange Computer Addressing Networks and Nodes Answer: Difficulty: Reference: L.O.:

c Medium Addressing Be familiar with addressing

24. IPv6 is based upon _________ -byte addresses. a. b. c. d. e.

32 24 4 16 8

Answer: Difficulty: Reference: L.O.:

d Medium Addressing Be familiar with addressing

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25. IPv4 uses ________ bytes per Internet address. a. b. c. d. e.

4 32 8 24 16

Answer: Difficulty: Reference: L.O.:

a Easy Addressing Be familiar with addressing

26. A(n) ________ refers to a group of computers that are logically grouped together by IP number. a. b. c. d. e.

IPv6 group subnet data link group TCP group application net

Answer: Difficulty: Reference: L.O.:

b Medium Addressing Be familiar with addressing

27. A subnet mask of ___________ means that all computers with only the same first two bytes in their IPv4 addresses are on the same subnet. a. b. c. d. e.

11111111.0.0.0 255.255.255.0 255.0.0.0 255.255.0.0 255.255.255.255

Answer: Difficulty: Reference: L.O.:

d Medium Addressing Be familiar with addressing

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28. Dynamic addressing: a. b. c. d. e.

assigns a permanent network layer address to a client computer in a network makes network management more complicated in dial-up networks has only one standard, bootp is always performed for servers only can solve many updating headaches for network managers who have large, growing, changing networks

Answer: Difficulty: Reference: L.O.:

e Easy Addressing Be familiar with addressing

29. ___________ is the translation of application layer addresses into IP addresses. a. b. c. d. e.

Network interface card reversal IPv6 Server name resolution Subnet masking Name service coding

Answer: Difficulty: Reference: L.O.:

c Easy Addressing Be familiar with addressing

30. Server name resolution is done using the: a. b. c. d. e.

Address Resolution Protocol Border Gateway Protocol Internet Control Message Protocol Routing Information Protocol Domain Name Service

Answer: Difficulty: Reference: L.O.:

e Medium Addressing Be familiar with addressing

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31. When TCP/IP translates an application layer address into an IP address, it sends a special __________ to the nearest DNS server. a. b. c. d. e.

broadcast message DNS request packet SNA packet IPX message X.25 packet

Answer: Difficulty: Reference: L.O.:

b Medium Addressing Be familiar with addressing

32. When TCP/IP translates a network layer address into a data link layer address, it sends a special ____________ to all computers in the subnet. a. b. c. d. e.

physical layer packet multicast message X.25 message broadcast message application layer packet

Answer: Difficulty: Reference: L.O.:

d Easy Addressing Be familiar with addressing

33. A(n) _________ is a specially formatted request used to perform IP address to data link address resolution. a. b. c. d. e.

Address Resolution Protocol request Domain Service Request HTTP request Link state request Autonomous System Request

Answer: Difficulty: Reference: L.O.:

a Medium Addressing Be familiar with addressing

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34. ___________ is the process of determining the path that a message will travel from sending computer to receiving computer. a. b. c. d. e.

Routing Addressing Interfacing Broadcasting Packetizing

Answer: Difficulty: Reference: L.O.:

a Medium Routing Be familiar with routing

35. The _____________ is used by a computer to determine how messages will travel through the network. a. b. c. d. e.

routing table configuration listing linking loader bus header assignment list file allocation table

Answer: Difficulty: Reference: L.O.:

a Medium Routing Be familiar with routing

36. In its simplest form, the __________ has two columns: the first column lists every destination network, while the second column lists the interface on which that computer should send messages, if they are destined for the network in the first column. a. b. c. d. e.

linking loader routing table configuration listing bus header assignment list file allocation table

Answer: Difficulty: Reference: L.O.:

b Medium Routing Be familiar with routing

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37. The three fundamental approaches to routing are: a. b. c. d. e.

circuitous, flat, and direct routing. connectionless, static, and connection-oriented. subordinate, master, and insubordinate routing. host, client, and client-server routing. centralized, static routing, and dynamic routing.

Answer: Difficulty: Reference: L.O.:

e Medium Routing Be familiar with routing

38. An advantage of centralized routing is: a. routing does reflect changing network conditions, such as computers that are overloaded by many messages b. if anything happens to the computer developing the routing table, the routing tables cannot be changed until that computer is fixed, or until a new computer is selected to perform the function c. routing decisions are simple d. the routing tables are stored at all computers in the network e. it requires more processing by each computer or router in the network than dynamic routing Answer: Difficulty: Reference: L.O.:

c Medium Routing Be familiar with routing

39. With ________ routing, computers or routers count the number of hops along a route and periodically exchange information on the hop count with their neighbors. a. b. c. d. e.

circuitous decentralized distance vector indirect link state

Answer: Difficulty: Reference: L.O.:

c Medium Routing Be familiar with routing

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40. ____________ refers to the type of routing in which the routing table is developed by the network manager and modifications are made only when computers are added to or removed from the network. a. b. c. d. e.

Adaptive routing Dynamic routing Static routing Distance vector routing Link state routing

Answer: Difficulty: Reference: L.O.:

c Medium Routing Be familiar with routing

41. _______________ is a type of dynamic routing. a. b. c. d. e.

Static routing Circuitous routing Centralized routing Link state X.25 routing

Answer: d Difficulty: Easy Reference: Routing L.O.: Be familiar with routing

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42. One drawback to dynamic routing is: a. Routing usually does not reflect changing network conditions, such as computers that are overloaded by many messages b. It cannot be used with non-government networks c. The transmission of status information “wastes” network capacity that could be used to send user messages d. It is the job of the network manager, not the computers or devices themselves, to maintain the routing table. e. It requires less processing by each computer than static routing.

Answer: Difficulty: Reference: L.O.:

c Medium Routing Be familiar with routing

43. The ping command uses the most basic interior routing protocol on the Internet, which is the: a. b. c. d. e.

Border Gateway Protocol Internet Control Message Protocol Routing Information Protocol Enhanced Interior Gateway Routing Protocol Open Shortest Path First

Answer: Difficulty: Reference: L.O.:

b Medium Routing Be familiar with routing

44. A type of message that is used when sending a message from one computer to another computer is called a: a. b. c. d. e.

unicast message multicast message broadcast message guided message radiated message

Answer: Difficulty: Reference: L.O.:

a Easy Routing Be familiar with routing

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45. A special type of message that is used when sending the same message to a specific group of computers is called a: a. b. c. d. e.

unicast message multicast message broadcast message guided message radiated message

Answer: Difficulty: Reference: L.O.:

b Easy Routing Be familiar with routing

46. A special type of message that is used when sending the same message to all computers on a specific LAN or subnet is called a: a. b. c. d. e.

unicast message multicast message broadcast message guided message radiated message

Answer: Difficulty: Reference: L.O.:

c Easy Routing Be familiar with routing

47. IGMP refers to: a. b. c. d. e.

Internet Giga Memory Parameters Interchange Group Management Parameters Internet Guided Meta Protocol Internet Group Management Protocol Interchange Guided Meta Protocol

Answer: Difficulty: Reference: L.O.:

d Easy Routing Be familiar with routing

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48. Which of the following is not given to a client computer when it is first installed on a TCP/IP network so that it has the appropriate routing/addressing information? a. b. c. d. e.

application layer address subnet mask its own IP address IP address of its DNS server IP address of a gateway, router, or a switch outside of its subnet

Answer: Difficulty: Reference: L.O.:

a Medium TCP/IP Example Be familiar with addressing

49. Which of the following is not a component of a router? a. b. c. d. e.

CPU Interface Memory Keyboard Port

Answer: Difficulty: Reference: L.O.:

d Easy Routing Be familiar with routing

50. A majority of routers use the following operating system: a. b. c. d. e.

Windows 10 Red Hat Linux Windows Server 2008 Cisco Internetwork Operating System Linksys OSI System

Answer: Difficulty: Reference: L.O.:

d Easy Routing Be familiar with routing

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51. The ______ defines what type of packets should be routed and what types of packets should be discarded. a. b. c. d. e.

ACL AFL TCP IOS OSI

Answer: Difficulty: Reference: L.O.:

a Easy Routing Be familiar with routing

52. _________created a service that allows organizations to transfer IPv4 addresses they do not need to another organization. a. b. c. d. e.

TCP/IP ARPANET ARIN AIS OSPF

Answer: Difficulty: Reference: L.O.:

c Easy Addressing Be familiar with addressing

53. IPv4 provides ___________ IP addresses. a. b. c. d. e.

a. 4.3 billion b. 144 million c. 64 billion d. 3.14 billion e. 1 million

Answer: Difficulty: Reference: L.O.:

a Easy Addressing Be familiar with addressing

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54. The _____ address range is reserved for a computer to communicate with itself and is called the loopback. a. b. c. d. e.

121 127 239 254 111

Answer: Difficulty: Reference: L.O.:

b Easy Addressing Be familiar with addressing

55. IP addresses from 224 to 239 belong to Class D and are reserved for a. b. c. d. e.

the government ISPs multicasting broadcasting private networks

Answer: Difficulty: Reference: L.O.:

c Easy Addressing Be familiar with addressing

56. Stop-and-wait ARQ uses ___________ type of data flow. a. b. c. d. e.

full simplex half complex full duplex half duplex full complex

Answer: Difficulty: Reference: L.O.:

d Medium Session Management Be familiar with linking to the application layer, segmenting, and session management

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57. What are the two types of ARQ? a. b. c. d. e.

Stop-and-wait and continuous Half and full duplex Continuous and intermittent Selective and continuous Stop-and-wait and selective

Answer: Difficulty: Reference: L.O.:

a Medium Session Management Be familiar with linking to the application layer, segmenting, and session management

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Chapter 6 Network Design True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. The campus backbone (or core layer) is the network architecture component responsible for providing end user access to the network.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Describe the overall process of designing and implementing a network

2. A traditional network design approach follows a structured systems analysis and design process similar to that used in building applications.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Describe the overall process of designing and implementing a network

3. The traditional network design approach works very well for rapidly changing networks.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Describe the overall process of designing and implementing a network

4. Today, most network designers use a three to five year planning horizon.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Describe the overall process of designing and implementing a network

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5. Today, the most expensive part of the network is the hardware.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Describe the overall process of designing and implementing a network

6. Today, many organizations design networks using the building-block approach.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Describe the overall process of designing and implementing a network

7. Needs analysis is the final step in the building block approach to network design.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Describe the overall process of designing and implementing a network

8. In technology design, a network designer looks at available technologies to see which options will satisfy users’ needs.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Describe the overall process of designing and implementing a network

9. Cost assessment is used to look at the relative cost of technologies used in a network design.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Describe the overall process of designing and implementing a network

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10. The goals in the needs analysis step of network design are precisely the same when designing LANs vs. when designing WANs. Answer: Difficulty: Reference: L.O.:

False Easy Needs Analysis Describe the overall process of designing and implementing a network

11. The step of understanding current traffic on a network provides a baseline against which future network requirements can be compared.

Answer: Difficulty: Reference: L.O.:

True Easy Needs Analysis Describe the overall process of designing and implementing a network

12. The primary goal of the needs analysis step in network design is to develop a physical network design.

Answer: Difficulty: Reference: L.O.:

False Easy Needs Analysis Describe the overall process of designing and implementing a network

13. Today, all network traffic is due to traffic from internal application systems.

Answer: Difficulty: Reference: L.O.:

False Easy Needs Analysis Understand the seven network architecture components

14. Networks requirements can be divided into mandatory, desirable and wish list requirements.

Answer: Difficulty: Reference: L.O.:

True Medium Needs Analysis Describe techniques for developing a logical network design

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15. Capacity planning is used to design circuit capacity.

Answer: Difficulty: Reference: L.O.:

True Easy Technology Design Describe techniques for developing a logical network design

16. The turnpike effect results when a network is used at a much lower rate than was anticipated when it was designed.

Answer: Difficulty: Reference: L.O.:

False Medium Technology Design Describe techniques for developing a logical network design

17. Simulation is a tool that can be used in designing networks.

Answer: Difficulty: Reference: L.O.:

True Medium Technology Design Understand network design principles

18. Cost assessment is the step in the network design in which many complex factors related to costs are documented.

Answer: Difficulty: Reference: L.O.:

True Easy Cost Assessment Understand network design principles

19. When obtaining the support of senior management for a proposed network, it is important to use as much technical network jargon as possible.

Answer: Difficulty: Reference: L.O.:

False Easy Cost Assessment Describe the overall process of designing and implementing a network

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20. The campus backbone is usually faster than the backbones used inside buildings.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the seven network architecture components

21. The most expensive part of the network today is the staff who design, operate, and maintain it.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Describe the overall process of designing and implementing a network

22. The emphasis is on network designs that reduce staff time needed to operate them.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Describe the overall process of designing and implementing a network

23. Network staff are often required to learn to operate a variety of devices.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Describe the overall process of designing and implementing a network

24. Network staff are often required to maintain a variety of devices.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Describe the overall process of designing and implementing a network

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25. When a variety of devices from different vendors is used in a network, it takes less time to perform network management activities.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Describe the overall process of designing and implementing a network

26. In designing LAN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

True Medium Needs Analysis Understand network design principles

27. In designing BN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

True Medium Needs Analysis Understand network design principles

28. In designing WAN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

True Medium Needs Analysis Understand network design principles

29. In designing LAN networks, network designers tend to err on the side of providing for less capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

False Medium Needs Analysis Understand network design principles

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30. In designing MAN networks, network designers tend to err on the side of providing for less capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

True Medium Needs Analysis Understand network design principles

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. Which of the following is not a step under the traditional network design approach? a. An analyst develops cost estimates of the circuits needed to support the network. b. An analyst takes the traffic on the current network and then multiplies that by a factor of 3.65 to come up with the estimate of the total traffic for the new network. c. An analyst meets with users to identify user needs. d. An analyst develops a precise estimate of the amount of data that users will send and receive to estimate the total amount of traffic on each part of the network. e. An analyst designs the circuits to support the estimated traffic, allowing for modest growth.

Answer: Difficulty: Reference: L.O.:

b Medium Introduction Describe the overall process of designing and implementing a network

2. The traditional network design approach does not work well for _________ networks. a. b. c. d. e.

slowly evolving rapidly growing static modestly growing not growing

Answer: Difficulty: Reference: L.O.:

b Easy Introduction Describe the overall process of designing and implementing a network

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3. Which of the following is not a current trend that is making the traditional design approach less appropriate for today’s networks? a. b. c. d. e.

The underlying technology of networking devices is changing very rapidly The underlying technology of client and server devices is changing very rapidly The underlying technology of circuits is changing very rapidly Growth in network traffic is very high The most expensive part of any network is the hardware

Answer: Difficulty: Reference: L.O.:

e Medium Introduction Describe the overall process of designing and implementing a network

4. Which of the following is not directly contributing to the dramatic increase in network traffic today? a. Video applications on networks are becoming common. b. Electronic mail is now used by most people who work in organizations. c. Web searches are now commonly performed by network users. d. Much of the video processing on computers can be off-loaded from the CPU onto high-end video cards. e. Multimedia applications on networks are becoming common.

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Describe the overall process of designing and implementing a network

5. Which of the following is false about staff costs for a network? a. The most expensive part of the network today is the staff who design, operate, and maintain it. b. The emphasis is on network designs that reduce staff time needed to operate them. c. Network staff are often required to learn to operate a variety of devices. d. Network staff are often required to maintain a variety of devices. e. When a variety of devices from different vendors is used in a network, it takes less time to perform network management activities.

Answer: Difficulty: Reference: L.O.:

e Medium Introduction Describe the overall process of designing and implementing a network

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6. The building block design approach is sometimes called: a. b. c. d. e.

wide and shallow narrow and deep wide and deep narrow and shallow narrow and flat

Answer: Difficulty: Reference: L.O.:

b Easy Introduction Describe the overall process of designing and implementing a network

7. Nowadays, most organizations use a simpler approach to network design called the ___________ approach. a. b. c. d. e.

building-block frame definition prototype systems development life cycle guided network

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Describe the overall process of designing and implementing a network

8. Which of the following is not one of the three major steps used in of the buildingblock process to network design? a. b. c. d. e.

cost assessment technology design implementation and maintenance needs analysis none of the above is a correct answer

Answer: Difficulty: Reference: L.O.:

c Easy Introduction Describe the overall process of designing and implementing a network

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9. In the __________ step of the building-block process to network design, the network designer attempts to understand the fundamental current and future network needs of the various users, departments, and applications. a. b. c. d. e.

technology design needs analysis narrow and deep analysis cost assessment distribution layering

Answer: Difficulty: Reference: L.O.:

b Easy Introduction Describe the overall process of designing and implementing a network

10. In the __________ step of the building-block process to network design, the network designer examines the available technologies and assesses which options will meet the users’ needs. a. b. c. d. e.

technology design needs analysis narrow and deep analysis cost assessment distribution layering

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Describe techniques for developing a logical network design

11. In the __________ step of the building-block process to network design, the network designer considers the relative cost of the technologies. a. b. c. d. e.

technology design needs analysis narrow and deep analysis cost assessment distribution layering

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Describe techniques for developing a logical network design

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12. Which of the following is not true about network design? a. In designing LAN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary. b. In designing BN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary. c. In designing WAN networks, network designers tend to err on the side of providing for more capacity than what is currently necessary. d. In designing LAN networks, network designers tend to err on the side of providing for less capacity than what is currently necessary. e. In designing MAN networks, network designers tend to err on the side of providing for less capacity than what is currently necessary.

Answer: Difficulty: Reference: L.O.:

d Medium Needs Analysis Understand network design principles

13. In needs analysis: a. b. c. d. e.

the costs of different physical network design alternatives are assessed the goal is to understand what users and applications the network will support the geographic scope is not an important consideration a baseline of current operations is not important the rate of growth of network traffic is not an issue

Answer: Difficulty: Reference: L.O.:

b Medium Needs Analysis Understand network design principles

14. Gaining an understanding of the current application system and messages provides a _________ against which future design requirements can be gauged. a. b. c. d. e.

backplane baseline turnpike document wish list RFP

Answer: Difficulty: Reference: L.O.:

b Medium Needs Analysis Understand network design principles

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15. The goal of the needs analysis step is to produce a ___________, or a statement of the network elements necessary to meet the needs of the organization. a. b. c. d. e.

building block access layer core layer cost assessment logical network design

Answer: Difficulty: Reference: L.O.:

e Easy Needs Analysis Understand network design principles

16. __________ is not an important consideration when network designers review old and new applications. a. b. c. d. e.

Reviewing the NFL scores Reviewing the organization’s possible changes in product mix Understanding the organization’s strategic plans Understanding development plans for new uses of electronic commerce Reviewing the organization’s business processes

Answer: Difficulty: Reference: L.O.:

a Medium Needs Analysis Understand network design principles

17. Which of the following is not an example of identifying protocols that are needed to support hardware and software requirements of applications that will use the network? a. an application will use HTTP over TCP/IP b. an application will run on an IBM mainframe and so the network will require SNA traffic c. an application will need a gateway to translate SNA traffic into TCP/IP protocols d. an application will use SPX/IPX with a Novell file server e. an application will have drop down menu choices Answer: Difficulty: Reference: L.O.:

e Medium Needs Analysis Understand network design principles

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18. Which of the following is not a way in which network requirements, identified in the needs analysis of the building-block network design process, are organized? a. b. c. d. e.

unnecessary requirements wish list requirements desirable requirements mandatory requirements none of the above is an appropriate answer

Answer: Difficulty: Reference: L.O.:

a Easy Needs Analysis Describe techniques for developing a physical network design

19. Which of the following is not included in the key deliverable for the needs assessment stage of the building-block network design process, the set of logical network diagrams? a. b. c. d. e.

applications of the proposed network servers in the proposed network circuits in the proposed network specific routers that have been chosen to implement the proposed network clients in the proposed network

Answer: Difficulty: Reference: L.O.:

d Easy Needs Analysis Describe techniques for developing a physical network design

20. Which of the following is not an example of a building block used in technology design? a. b. c. d. e.

typical application typical user high traffic application standard network circuit specifications for a particular lighting fixture in the network operating center

Answer: Difficulty: Reference: L.O.:

e Easy Technology Design Describe techniques for developing a physical network design

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21. Once the needs have been defined in the logical network design, the next step is to develop a(n) __________. a. b. c. d. e.

application baseline technology design turnpike design backplane design

Answer: Difficulty: Reference: L.O.:

c Easy Introduction Describe techniques for developing a logical network design

22. Estimating the size and type of the “standard” and “advanced” network circuits is called _________. a. b. c. d. e.

needs categorization turnpike design cost assessment capacity planning soliciting RFPs

Answer: Difficulty: Reference: L.O.:

d Medium Technology Design Describe techniques for developing a logical network design

23. Which of the following would not be a type of circuit that needs to be considered when planning for technology design capacity? a. b. c. d. e.

1000 Mbps Ethernet 10 Mbps 100 Mbps 1 Gbps

Answer: Difficulty: Reference: L.O.:

b Medium Technology Design Describe techniques for developing a physical network design

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24. In the technology design stage of network design, a. the fundamental technology/protocols to be chosen have no relationship with the circuit capacity b. the decision for fundamental technology/protocols can be made without considering circuit capacity c. the decision for circuit capacity can be made without considering fundamental technology/protocols d. the decisions for fundamental technology/protocols and circuit capacity are interrelated e. the decision for fundamental technology/protocols and/or circuit capacities is not made at this stage Answer: Difficulty: Reference: L.O.:

d Medium Technology Design Describe techniques for developing a logical network design

25. ___________ refers to the amount of data transmitted on a circuit. a. b. c. d. e.

Circuit loading Leading edge deployment Capacity planning Calculating message volumes Requirements documentation

Answer: Difficulty: Reference: L.O.:

a Easy Technology Design Describe techniques for developing a physical network design

26. __________ is an estimate of the highest data volume on a link. a. b. c. d. e.

Data mode Backplane load Peak circuit traffic Leading edge data flow Circuit transfer

Answer: Difficulty: Reference: L.O.:

c Easy Technology Design Describe techniques for developing a physical network design

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27. To establish circuit loading, the designer usually starts with the: a. total characters transmitted per day on each circuit, or, if possible, the number of characters transmitted per two-second intervals if peaks must be met b. individual user training c. bus diameter, disk cache that is used at the server station d. channel bandwidth and baud rate used at each client e. local, trunk, IXC, DDD, and leased-line circuit bandwidth for each node Answer: Difficulty: Reference: L.O.:

a Medium Technology Design Describe techniques for developing a physical network design

28. According to one rule of thumb, ______ percent of circuit loading information is easy to gather. a. b. c. d. e.

50 25 80 19 20

Answer: Difficulty: Reference: L.O.:

c Medium Technology Design Describe techniques for developing a physical network design

29. A _________ results when a network is used much more than was originally anticipated by the network designer. a. b. c. d. e.

leading edge data flow circuit load turnpike effect protocol volume capacity plan

Answer: Difficulty: Reference: L.O.:

c Medium Technology Design Describe techniques for developing a physical network design

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30. There are some network modeling tools that can ________ the existing network. a. b. c. d. e.

discover disassemble sensitize maintain implement

Answer: Difficulty: Reference: L.O.:

a Medium Technology Design Describe techniques for developing a physical network design

31. ________ is used to model the behavior of the planned communication network once the proposed network map is complete. a. b. c. d. e.

Implementation Post-implementation review Documentation Simulation Training users

Answer: Difficulty: Reference: L.O.:

d Medium Technology Design Describe techniques for developing a physical network design

32. Which of the following are not costs that are generally considered during the cost assessment stage of the building-block network design process? a. b. c. d. e.

cost of advertising brochures for new products to be offered by an organization internetworking devices cost network management costs circuit costs software costs for network operating system

Answer: Difficulty: Reference: L.O.:

a Medium Cost Assessment Describe techniques for developing a physical network design

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33. Which of the following is not a main item for which network designers estimate costs for the proposed network? a. b. c. d. e.

software hardware purchasing and installing circuits ergonomic chairs for users circuits provided by common carriers

Answer: Difficulty: Reference: L.O.:

d Easy Cost Assessment Describe techniques for developing a physical network design

34. To estimate costs for large network purchases, organizations often: a. purchase all network purchases ‘off the shelf’ b. obtain ‘book value’ information for the existing network from the accounting department c. ask other companies for an itemized list of their previous year’s IT equipment purchases d. multiply old network costs by a factor of 3 e. issue an RFP to vendors Answer: Difficulty: Reference: L.O.:

e Medium Cost Assessment Understand network design principles

35. RFP stands for: a. b. c. d. e.

Request for Proposal Ring Fault Path Routing File Protocol Record Facsimile Program Redundant File Protocol

Answer: Difficulty: Reference: L.O.:

a Medium Cost Assessment Describe the overall process of designing and implementing a network

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36. Estimating the cost of a network is ______ complex than estimating the cost of one new piece of data processing hardware. a. b. c. d. e.

much more much less about the same exactly the same a little more

Answer: Difficulty: Reference: L.O.:

a Easy Cost Assessment Describe the overall process of designing and implementing a network

37. Which of the following is a way to sell the network proposal to management? a. b. c. d. e.

talk about upgrades from 10Mbps to 100Mbps give many details about using routers vs. gateways for a particular connection concentrate on a discussion about token ring vs. Ethernet protocol focus on the growth in network use discuss SNA architecture

Answer: Difficulty: Reference: L.O.:

d Easy Cost Assessment Describe the overall process of designing and implementing a network

38. Which of the following is not a key deliverable for the cost assessment step of the building-block network design process? a. b. c. d.

RFP list of wish list requirements revised physical network diagram business case, defined in business objectives and business language, that supports the network design e. none of the above is an appropriate choice Answer: Difficulty: Reference: L.O.:

b Easy Cost Assessment Describe the overall process of designing and implementing a network

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39. The large network purchases are done: a. b. c. d. e.

before the vendor(s) are selected before the RFP is sent out after the RFP is sent out, but before the vendor(s) are selected after the vendor(s) are selected after the network has been implemented

Answer: Difficulty: Reference: L.O.:

d Medium Cost Assessment Describe the overall process of designing and implementing a network

40. The network architecture component which enables users to access the network is the a. b. c. d. e.

LAN building backbone campus backbone enterprise edge WAN

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Understand the seven network architecture components

41. The network architecture component that is sometimes referred to as the distribution layer is the a. b. c. d. e.

LAN building backbone campus backbone enterprise edge WAN

Answer: Difficulty: Reference: L.O.:

b Medium Introduction Understand the seven network architecture components

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42. The network architecture component which contains the organization’s servers is called the a. b. c. d. e.

LAN building backbone data center enterprise edge WAN

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Understand the seven network architecture components

43. The network architecture component that is a special LAN with a group of servers that enables electronic data exchange of between the organization and the external entities it does business with is called the a. b. c. d. e.

LAN building backbone data center enterprise edge e-commerce edge

Answer: Difficulty: Reference: L.O.:

e Medium Introduction Understand the seven network architecture components

44. A circuit that is filled almost to its capacity and thus is the critical point that determines whether users get good or bad response times is referred to as a(n) a. b. c. d. e.

bottleneck building backbone breakneck congested network e-commerce edge

Answer: Difficulty: Reference: L.O.:

a Medium Technology Design Understand network design principles

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Chapter 6 Test Bank

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Chapter 6 Test Bank

Chapter 7 Wired and Wireless Local Area Networks True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. An access point plays the same role in a wireless network as a router does in a wired Ethernet network.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

2. STP cable is least costly type of cable used in today’s networks and is the most commonly used cable type in connecting computers to switches.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

3. The term “domain controller” is a name commonly used to refer to a Microsoft directory services server.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

4. The Network Interface Card (NIC) permits a computer to be physically connected to a network’s cable.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

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5. LANs that run on radio frequencies use a type of wired media.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the major components of LANs

6. Fiber optic cable is thicker and heavier than unshielded twisted pair.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Be able to design wired Ethernet LANs

7. Many network hubs and switches incorporate repeaters to regenerate signals so that attenuation of the signal does not occur.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

8. The NOS software for the server computer provides the physical, data link, and network layer functions.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

9. One of the most important functions of Network Operating System (NOS) is a directory service.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the major components of LANs

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10. LDAP is an industry standard directory protocol.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the major components of LANs

11. A hardware device that is not included in a network profile cannot be accessed by another computer on the network.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the major components of LANs

12. Network profile refers to what resources on each server are available on the network for use by other computers and which devices or people are allowed access on the network.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

13. Hub-based Ethernet is a star physical topology and a bus logical topology.

Answer: Difficulty: Reference: L.O.:

True Easy Wired Ethernet Be able to design wired Ethernet LANs

14. Ethernet is a layer 3 protocol, which operates at the network layer.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Be able to design wired Ethernet LANs

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15. The Ethernet standard was first developed by the IEEE. Answer: Difficulty: Reference: L.O.:

False Medium Wired Ethernet Be able to design wired Ethernet LANs

16. Physical topology refers to the geometric layout of the network and describes how the computers are interconnected.

Answer: Difficulty: Reference: L.O.:

True Easy Wired Ethernet Understand the major components of LANs

17. A collision on a bus circuit means that two computers on that circuit have transmitted at the same time.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Be able to design wired Ethernet LANs

18. The three latest versions of Ethernet run at speeds of 1Gbps, 10Gbps, and 50 Gbps.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Be able to design wired Ethernet LANs

19. 1000Base-LX is a version of 1000Base-T than runs on four pairs of CAT 5 cable.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Be able to design wired Ethernet LANs

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20. A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Understand the major components of LANs

21. A forwarding table tells a switch which port it should send out a packet to get to the destination computer.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Be able to design wired Ethernet LANs

22. When a switch receives an Ethernet frame with a destination address that is not in its forwarding table, the switch will broadcast the frame out all of its other ports.

Answer: Difficulty: Reference: L.O.:

True Easy Wired Ethernet Understand the major components of LANs

23. Cut-through switching has fewer errors than store and forward switching.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Understand the major components of LANs

24. Store and forward switching may only be used when the incoming and outgoing data circuit have the same data rate.

Answer: Difficulty: Reference: L.O.:

False Easy Wired Ethernet Understand the major components of LANs

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25. A switch can send and receive on all circuits simultaneously.

Answer: Difficulty: Reference: L.O.:

True Easy Wired Ethernet Understand the major components of LANs

26. Wireless LANs are never connected to a wired network.

Answer: Difficulty: Reference: L.O.:

False Easy Wireless Ethernet Understand the best practice recommendations for LAN design

27. An access point (AP) is required to connect a WLAN to a wired network.

Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

28. An access point ensures that all computers within range of the access point can communicate with each other, Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

29. Most access points (AP) deployed in wireless LANs use directional antennas.

Answer: Difficulty: Reference: L.O.:

False Easy Wireless Ethernet Be able to design wireless Ethernet LANs

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30. Directional antennas signals are much stronger than omnidirectional antennas.

Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

31. Wireless LANs use Carrier Sense Multiple Access with Collision Detection (CSMA/CD) for medic access control.

Answer: Difficulty: Reference: L.O.:

False Medium Wireless Ethernet Be able to design wireless Ethernet LANs

32. Distributed Coordination Function is a media access control method used in wireless LANs where the sender waits for an ACK (acknowledgement) from the receiver before transmitting any more packets.

Answer: Difficulty: Reference: L.O.:

True Medium Wireless Ethernet Be able to design wireless Ethernet LANs

33. Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit (RTS) packet to the access point and waits for a clear-to-send (CTS) packet from the AP before it can communicate with other nodes on the network.

Answer: Difficulty: Reference: L.O.:

True Medium Wireless Ethernet Be able to design wireless Ethernet LANs

34. The DCF function of Wi-Fi resolves the hidden node problem.

Answer: Difficulty: Reference: L.O.:

False Medium Wireless Ethernet Be able to design wireless Ethernet LANs

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35. The frequency ranges of some access points are the same as some cordless telephones.

Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

36. An 802.11g NIC can communicate with an 802.11n access point operating in mixed mode.

Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

37. The data link layer protocols used by wireless LANs are similar to the ones used on Ethernet LANs Answer: Difficulty: Reference: L.O.:

True Easy Wireless Ethernet Be able to design wireless Ethernet LANs

38. Wireless LANs do not share the bandwidth capacity of the wireless network.

Answer: Difficulty: Reference: L.O.:

False Easy Wireless Ethernet Be able to design wireless Ethernet LANs

39. A site survey is not an important component of a WLAN design.

Answer: Difficulty: Reference: L.O.:

False Medium Wireless Ethernet Be able to design wireless Ethernet LANs

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40. Wired Equivalent Privacy requires that each user have a preconfigured key in order to communicate with an access point.

Answer: Difficulty: Reference: L.O.:

True Medium Wireless Ethernet Be able to design wireless Ethernet LANs

41. Wi-Fi Protected Access (WPA) uses the same key for every packet that is transmitted to the client.

Answer: False Difficulty: Medium Reference: Wireless Ethernet L.O.: Be able to design wireless Ethernet LANs

42. Directional antennas produce a stronger signal over longer distances than omnidirectional antennas.

Answer: Difficulty: Reference: L.O.:

True Medium Wireless Ethernet Be able to design wireless Ethernet LANs

43. Category 1 cable is an old standard that is no longer in use.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

44. Category 2 cable is standard voice-grade twisted-pair wires.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

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45. Category 2 and category 4 cable are old standards no longer in use today.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the best practice recommendations for LAN design

46. Category 7 cable has less range than the other types of cable.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

47. The maximum range of a Category 6 cable is 100 meters.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

48. Category 8 have a maximum range of 15 meters, which means they are typically used between networking devices that are near each other (e.g., in a rack or data center).

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

49. The maximum range of Category 7 cables is 15 meters.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the best practice recommendations for LAN design

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50. Hub-based Ethernet is seldom used by companies today.

Answer: Difficulty: Reference: L.O.:

True Easy LAN Components Understand the best practice recommendations for LAN design

51. Almost all corporate installations of Ethernet today use hubs rather than switches.

Answer: Difficulty: Reference: L.O.:

False Easy LAN Components Understand the best practice recommendations for LAN design

52. Fiber optic cable is thinner than unshielded twisted pair cable.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

53. Fiber optic cable is lighter than unshielded twisted pair cable.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

54. Fiber optic cable has a very low capacity.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

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55. Fiber optic cable is more expensive than CAT5 unshielded twisted pair cable.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

56. Fiber optic cable is the least expensive cable option.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

57. Fiber optic cable is a type of guided media.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

58. A hub in a network can be used to act as a communications server.

Answer: Difficulty: Reference: L.O.:

False Medium LAN Components Understand the major components of LANs

59. A hub in a network can be used to connect network cables.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

60. A hub in a network can be used to prevent attenuation.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

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61. A hub in a network can be used to act as a junction box.

Answer: Difficulty: Reference: L.O.:

True Medium LAN Components Understand the major components of LANs

62. With layer-2 switched Ethernet, a switch replaces the hub.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

63. With layer-2 switched Ethernet, the physical topology is the same as the physical topology of shared Ethernet: a ring.

Answer: Difficulty: Reference: L.O.:

False Medium Wired Ethernet Understand the major components of LANs

64. With layer-2 switched Ethernet, the logical topology is a star.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

65. With layer-2 switched Ethernet, the switch uses a forwarding table to switch the frame to the correct circuit/computer.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

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66. With layer-2 switched Ethernet, the switch chooses which frame to transmit first if it receives more than one frame destined for the same computer at the same time, and stores the other frame(s) temporarily.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

67. With switched Ethernet, the switch has a physical bus topology.

Answer: Difficulty: Reference: L.O.:

False Medium Wired Ethernet Understand the major components of LANs

68. With switched Ethernet, it uses a switch instead of a hub.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

69. With switched Ethernet, most switches support full duplex circuits.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

70. With switched Ethernet, it essentially provides a point-to-point connection between computers.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

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71. With switched Ethernet, it has forwarding tables in which entries are learned over time.

Answer: Difficulty: Reference: L.O.:

True Medium Wired Ethernet Understand the major components of LANs

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. A(n) _____________ is not a common type of dedicated server. a. b. c. d. e.

file server print server database server collision server web server

Answer: Difficulty: Reference: L.O.:

d Medium LAN Components Understand the major components of LANs

2. A(n) ____________ allows many users to share the same set of files on a common, shared disk drive. a. b. c. d. e.

print server database server file server piconet server remote access server

Answer: Difficulty: Reference: L.O.:

c Medium LAN Components Understand the major components of LANs

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3. Which of the following is not a basic LAN component? a. b. c. d. e.

client PAD server network interface card network operating system

Answer: Difficulty: Reference: L.O.:

b Easy LAN Components Understand the major components of LANs

4. Which of the following is not an advantage of using Cat5 unshielded twisted pair for cabling LANs? a. b. c. d. e.

cost (relative to fiber) thickness (relative to coax) weight (relative to coax) flexibility (relative to coax) security (relative to fiber)

Answer: Difficulty: Reference: L.O.:

e Medium LAN Components Understand the major components of LANs

5. Of the following, which is not true about fiber optic cable? a. b. c. d. e.

It is thinner than unshielded twisted pair cable.

It is lighter than unshielded twisted pair cable.

It has a very low capacity.

It is more expensive than CAT5 unshielded twisted pair cable.

It is a type of guided media.

Answer: Difficulty: Reference: L.O.:

c Medium LAN Components Understand the major components of LANs

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6. Which of the following is not a purpose for using hubs in a network? a. b. c. d. e.

to act as a communications server to connect network cables to prevent attenuation to act as a junction box none of the above

Answer: Difficulty: Reference: L.O.:

a Medium LAN Components Understand the major components of LANs

7. Which of the following type of media is most commonly used in backbone networks because of its high capacity? a. b. c. d. e.

fiber infrared frequencies coax cable unshielded twisted pair shielded twisted pair

Answer: Difficulty: Reference: L.O.:

a Easy LAN Components Understand the major components of LANs

8. Hubs: a. b. c. d. e.

usually incorporate repeaters or amplifiers allow for simultaneous communication for all of the computers connected to them limit the distance of a network to a few meters in length are a difficult method to connect network cables operate at the application layer

Answer: Difficulty: Reference: L.O.:

a Medium LAN Components Understand the major components of LANs

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9. _____________ is the software that controls the network. a. b. c. d. e.

Network Operating System Client Operating System Embedded Operating System Network Control System Network Software System

Answer: Difficulty: Reference: L.O.:

a Medium LAN Components Understand the major components of LANs

10. The server version of the Network Operating System does not: a. provide the software that performs the functions associated with the physical layer. b. provide the software that performs the functions associated with the data link layer. c. provide the software that performs the functions associated with the application layer. d. provide the software that performs the functions associated with the network layer. e. usually provide the software that performs the functions associated with the computer’s own operating system.

Answer: Difficulty: Reference: L.O.:

a Medium LAN Components Understand the major components of LANs

11. _____________ provide information about resources on the network that are available to the users, such as shared printers, file servers and application software. a. b. c. d. e.

Network Services Directory Services Client Services Computing Services Remote Access Services

Answer: Difficulty: Reference: L.O.:

b Medium LAN Components Understand the major components of LANs

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12. A _________ is a group of centrally organized, related resources. a. b. c. d. e.

workgroup domain server client sharepoint

Answer: Difficulty: Reference: L.O.:

b Medium LAN Components Understand the major components of LANs

13. A hierarchical tree of active directory domains within one organization that is linked to other trees in the organization is called a/n ___________. a. b. c. d. e.

ADS domain forest tree NDS

Answer: Difficulty: Reference: L.O.:

c Medium LAN Components Understand the major components of LANs

14. A __________ indicates what resources on each server are available on the network for use by other computers and what people are allowed what access to the network. a. b. c. d. e.

user profile user access log network profile network operating system server allocation list

Answer: Difficulty: Reference: L.O.:

c Easy LAN Components Understand the major components of LANs

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15. The cheapest time to install network cabling is: a. b. c. d.

during the construction of the building. as soon as the building is completed. as soon as the building is occupied. about five years after the building is occupied so that the exact office locations for each network computer is known. e. any time that a network needs to be installed.

Answer: Difficulty: Reference: L.O.:

a Medium Wired Ethernet Be able to design wired Ethernet LANs

16. Ethernet LAN was developed by: a. b. c. d. e.

IBM. ARPANET. DEC, Xerox, and Intel.

University of Minnesota.

CERN laboratory in Geneva.

Answer: Difficulty: Reference: L.O.:

c Easy Wired Ethernet Be able to design wired Ethernet LANs

17. ___________ is how the network works conceptually. a. b. c. d. e.

Physical topology Logical topology Network topology Ethernet Media access control

Answer: Difficulty: Reference: L.O.:

b Easy Wired Ethernet Be able to design wired Ethernet LANs

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18. The type of logical topology that hub-based Ethernet uses is a: a. b. c. d. e.

ring bus star mesh interconnected

Answer: Difficulty: Reference: L.O.:

b Easy Wired Ethernet Be able to design wired Ethernet LANs

19. A logical bus topology: a. is always used by token ring protocol LANs. b. has all computers connected to each other in point-to-point connections. c. is limited to short distances since devices like a hub or repeater cannot be used with this type of topology. d. permits every message to be received by every computer on the bus, even when those messages are intended for other computers. e. has a central control device, such as a mainframe.

Answer: Difficulty: Reference: L.O.:

d Medium Wired Ethernet Be able to design wired Ethernet LANs

20. Media access control refers to: a. b. c. d. e.

the price of fiber optic cable. security over floppy disks in a user environment. the ability for a user to use multimedia equipment in a LAN. controlling access to a media by more than one computer in a LAN. the control over coax cable installed by a cable service provider.

Answer: Difficulty: Reference: L.O.:

d Medium Wired Ethernet Be able to design wired Ethernet LANs

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21. Which of the following is not true about CSMA/CD? a. b. c. d.

The acronym refers to Carrier Sense Multiple Access with Collision Detection It is used in token ring protocol LANs It is a contention-based media access control technique When a collision has occurred, the computers that wish to transmit wait a random amount of time after a colliding message before attempting to retransmit e. Computers on the circuit ‘listen’ before transmitting Answer: Difficulty: Reference: L.O.:

b Medium Wired Ethernet Be able to design wired Ethernet LANs

22. _________ is not a type of Ethernet specification. a. b. c. d. e.

100Base-T 10GbE 1000Base-T (1GbE) 10Base-T Securenet

Answer: Difficulty: Reference: L.O.:

e Medium Wired Ethernet Be able to design wired Ethernet LANs

23. 100Base-T: a. b. c. d. e.

supports 100 Mbps data rate is inexpensive runs on twisted pair is more dominant than token ring all of the answers are correct

Answer: Difficulty: Reference: L.O.:

e Medium Wired Ethernet Be able to design wired Ethernet LANs

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24. 100 Base-T: a. b. c. d. e.

can run at either full- or half-duplex is one of the oldest forms of Ethernet is one of the slowest forms of Ethernet can only be used over coaxial cables has only one version, 100Base-SLCX

Answer: Difficulty: Reference: L.O.:

a Medium Wired Ethernet Be able to design wired Ethernet LANs

25. ________ is a hybrid version of Ethernet that uses either 10Base-T, 100Base-T, or 1000Base-T. a. b. c. d. e.

Mullion Ethernet Base-T Ethernet 10/100/1000 Ethernet Token ring Ethernet FDDI Ethernet

Answer: Difficulty: Reference: L.O.:

c Easy Wired Ethernet Be able to design wired Ethernet LANs

26. Switch-based Ethernet: a. b. c. d. e.

uses a hub to connect computers has a physical topology of a ring has a logical topology of a ring has a logical topology of a bus usually enables all attached circuits to send or receive packets simultaneously

Answer: Difficulty: Reference: L.O.:

e Medium Wired Ethernet Be able to design wired Ethernet LANs

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27. A switch uses a _____________ that is very similar to a routing table used in a router. a. b. c. d. e.

cable plan forwarding table network server reversing table switching mullion

Answer: b Difficulty: Easy Reference: Wired Ethernet L.O.: Understand the major components of LANs

28. Which of the following is not true about layer-2 switched Ethernet? a. A switch replaces the hub. b. The physical topology is the same as the physical topology of shared Ethernet: a ring. c. The logical topology is a star. d. The switch uses a forwarding table to switch the frame to the correct circuit/computer. e. The switch chooses which frame to transmit first if it receives more than one frame destined for the same computer at the same time, and stores the other frame(s) temporarily.

Answer: Difficulty: Reference: L.O.:

b Medium Wired Ethernet Understand the major components of LANs

29. Which of the following is not true about switched Ethernet? a. b. c. d. e.

The switch has a physical bus topology.

It uses a switch instead of a hub.

Most switches support full duplex circuits.

It essentially provides a point-to-point connection between computers.

It has forwarding tables in which entries are learned over time.

Answer: Difficulty: Reference: L.O.:

a Medium Wired Ethernet Understand the major components of LANs

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30. Which of the following is a mode in which a switch reads in the first 64 bytes of the Ethernet frame and then begins forwarding out the frame on an outgoing port? a. b. c. d. e.

fast learning switching routing switching fragment-free switching store switching cut switching

Answer: Difficulty: Reference: L.O.:

c Medium Wired Ethernet Understand the major components of LANs

31. Each of the full duplex circuits connected to a switch is a separate _______________ circuit connecting the switch to a device on the network. a. b. c. d. e.

multipoint point-to-point shared ring star

Answer: Difficulty: Reference: L.O.:

b Easy Wired Ethernet Understand the major components of LANs

32. Wired Ethernet is becoming a _______________ technology for small SOHO devices, meaning that manufacturers are no longer creating new products. . a. b. c. d. e.

host legacy caching hub peak

Answer: Difficulty: Reference: L.O.:

b Medium Wired Ethernet Be able to design wired Ethernet LANs

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33. Which of the following can provide fault tolerance for the storage space on a server? a. b. c. d. e.

RAID SCSI IDE USB EIDE

Answer: Difficulty: Reference: L.O.:

a Easy Improving LAN Performance Be able to improve LAN performance

34. Which of the following is not a potential bottleneck for LAN performance? a. b. c. d. e.

number and speed of hard disks in the server amount of memory in the server speed of server’s CPU network interface card all of the answers are potential bottlenecks for LAN performance

Answer: Difficulty: Reference: L.O.:

e Medium Improving LAN Performance Be able to improve LAN performance

35. If your LAN server is overloaded, which of the following should you not consider (to solve the server problem)? a. b. c. d. e.

adding one or more additional servers upgrading the server’s CPU with a faster CPU increasing the amount of memory of the server increasing the number and speed of hard disks in the server replacing the cable with fiber optic cable

Answer: Difficulty: Reference: L.O.:

e Medium Improving LAN Performance Be able to improve LAN performance

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36. To increase the volume of simultaneous messages the LAN circuit can transmit from network clients to the server(s), you can: a. b. c. d. e.

increase the CPU of the server upgrade to a bigger circuit increase the number of hard disks on the server increase the amount of disk capacity of the server increase the amount of memory of the server

Answer: Difficulty: Reference: L.O.:

b Easy Improving LAN Performance Be able to improve LAN performance

37. Breaking a network into smaller parts is called network: a. b. c. d. e.

fragmentation segmentation localization allocation mitigation

Answer: Difficulty: Reference: L.O.:

b Easy Improving LAN Performance Be able to improve LAN performance

38. Which of the following is not an effective way to reduce LAN network demand: a. move files to client computers b. use disk caching on the client machines c. find an application that places a large demand on the network and run it a time when the network is lightly loaded d. add hidden nodes e. shift the users’ routines Answer: Difficulty: Reference: L.O.:

d Medium Improving LAN Performance Be able to improve LAN performance

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39. Which of the following is not a WLAN standard? a. b. c. d. e.

802.11ac 802.11a 802.3 802.11b 802.11g

Answer: c Difficulty: Easy Reference: Wireless Ethernet L.O.: Be able to design wireless Ethernet LANs

40. The IEEE designation for the type of wireless standard that uses both the 2.4 and 5 GHz range is __________. a. b. c. d. e.

802.11n 802.11a 802.3 802.11b 802.11g

Answer: Difficulty: Reference: L.O.:

a Easy Wireless Ethernet Be able to design wireless Ethernet LANs

41. A(n) _____________ is used in a computer to connect it to a WLAN. a. b. c. d. e.

Ethernet NIC antennae wireless NIC access point hub

Answer: Difficulty: Reference: L.O.:

c Easy LAN Components Be able to design wireless Ethernet LANs

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42. A(n) ___________ is a radio transceiver that plays the same role as a hub or switch in a wired network and connects the WLAN to the wired network. a. b. c. d. e.

Ethernet NIC antennae wireless NIC access point hub

Answer: Difficulty: Reference: L.O.:

d Medium LAN Components Be able to design wireless Ethernet LANs

43. How many channels does the 802.11ac standard provide for communication between the access point and clients? a. b. c. d. e.

4 6 8 11 2

Answer: Difficulty: Reference: L.O.:

c Medium Wireless Ethernet Be able to design wireless Ethernet LANs

44. __________ antennas transmit the signal in all directions. a. b. c. d. e.

directional microware omnidirectional radio vertical

Answer: Difficulty: Reference: L.O.:

c Easy Wireless Ethernet Be able to design wireless Ethernet LANs

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45. __________ antennas project a signal in only one direction and are most often used on the inside of an exterior wall pointing to the inside of the building for security reasons. a. b. c. d. e.

directional microware omnidirectional radio vertical

Answer: Difficulty: Reference: L.O.:

a Medium Wireless Ethernet Be able to design wireless Ethernet LANs

46. CSMA/CA is an acronym for: a. b. c. d. e.

Carrier Sense Multiple Access with Collision Acknowledgment Carrier Sense Mode Access with Carrier Avoidance Carrier Sense Multiple Access with Collision Avoidance Carrier Sensory Multiple Access without Collision Acknowledgment Carrier Sense Multiple Acknowledgment with Collision Avoidance

Answer: Difficulty: Reference: L.O.:

c Medium Wired Ethernet Be able to design wireless Ethernet LANs

47. Another name for distributed coordination function (DCF) is __________. a. b. c. d. e.

distributed carrier sense method physical carrier sense method physical carrier sense mode distributed carrier sense mode distributed coordination mode

Answer: Difficulty: Reference: L.O.:

b Medium Wireless Ethernet Be able to design wireless Ethernet LANs

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48. When a computer transmits at the same time because it cannot sense that another computer on the WLAN is currently transmitting is referred to as the: a. b. c. d. e.

out of range problem collision problem hidden node problem controlled access problem media access problem

Answer: Difficulty: Reference: L.O.:

c Medium Wireless Ethernet Be able to design wireless Ethernet LANs

49. The maximum data rate of a an 802.11ad WLAN is a. b. c. d. e.

24 Mbps 36 Mbps 11 Mbps 7Gbps 9 Mbps

Answer: Difficulty: Reference: L.O.:

d Easy Wireless Ethernet Be able to design wireless Ethernet LANs

50. Many organizations today are installing traditional wired Ethernet for desktop users and install Wi-Fi as ______________. a. b. c. d. e.

overlay networks Bluetooth cellular networks mobile networks Ethernet networks

Answer: Difficulty: Reference: L.O.:

a Medium The Best Practice LAN Design Be able to design wireless Ethernet LANs

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51. Which of the following is not determined by a site survey? a. b. c. d. e.

feasibility of the desired coverage potential sources of interference the security of the WLAN estimated number of access points needed to provide coverage current locations of the wired network into which the WLAN will connect.

Answer: Difficulty: Reference: L.O.:

c Medium Wireless Ethernet Be able to improve LAN performance

52. _____________ refers to practice of writing symbols in chalk on sidewalks and walls to indicate the presence of an unsecured WLAN. a. b. c. d. e.

Wardriving Chalking Warchalking Marking Identifying

Answer: Difficulty: Reference: L.O.:

c Medium Wireless Ethernet Be able to design wireless Ethernet LANs

53. With _____________, the AP permits the owner to provide a list of valid addresses that can connect. a. b. c. d. e.

EAP SSID WEP MAC address filtering SWEP

Answer: Difficulty: Reference: L.O.:

d Medium Wireless Ethernet Be able to design wireless Ethernet LANs

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54. IEEE 802.11ac runs on two different frequency spectrums simultaneously. Which of the following are those two frequencies? a. b. c. d. e.

2.4GHz and 5GHz 24GHz and 5GHz 11GHz and 54GHz 8GHz and 11GHz 2.4GHz and 11GHz

Answer: Difficulty: Reference: L.O.:

a Medium Wireless Ethernet Be able to design wireless Ethernet LANs

55. WiGig is standardized as a. b. c. d. e.

IEEE 802.11ad IEEE 802.11ac IEEE 802.11n IEEE 802.11g IEEE 802.11a

Answer: Difficulty: Reference: L.O.:

a Medium Wireless Ethernet Be able to design wireless Ethernet LANs

56. The ___________ is where the organization housing its primary servers. a. b. c. d. e.

MDF guest house SOHO network data center load balancer

Answer: Difficulty: Reference: L.O.:

d Medium The Best Practice LAN Design Understand the major components of LANs

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57. The ________ acts as a router at the front of the server farm. a. b. c. d. e.

load router MDF Layer 2 switch front-end loader load balancer

Answer: Difficulty: Reference: L.O.:

e Medium The Best Practice LAN Design Understand the major components of LANs

58. ____ is the process of creating several logically separate servers on the same physical computer. a. b. c. d. e.

Server virtualization Server optimization Server proliferation Server platforming Server redundancy

Answer: Difficulty: Reference: L.O.:

a Medium The Best Practice LAN Design Understand the major components of LANs

59. A ___ has a set of high-speed storage devices and servers that are networked together using a very high-speed network. a. b. c. d. e.

wide area network local area network storage area network storage server local area storage WAN

Answer: Difficulty: Reference: L.O.:

c Medium The Best Practice LAN Design Understand the major components of LANs

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60. The _____ contains the servers that are designed to serve data to customers and suppliers. a. b. c. d. e.

e-commerce edge SAN LAN domain controller bottleneck

Answer: Difficulty: Reference: L.O.:

a Medium The Best Practice LAN Design Understand the major components of LANs

61. _______ are wired into a Wi-Fi Controller. They report what devices are attached to them and how busy they are to the controller, which balances traffic across the APs it manages. a. b. c. d. e.

Managed APs Managed routers SAN Managed Wi-Fi hub Wireless router

Answer: Difficulty: Reference: L.O.:

a Medium Designing User Access with Wireless Ethernet Be able to design wireless Ethernet LANs

62. ______ provides Ethernet over the existing electrical power wires in your house at rates up to 1 Gbps. a. b. c. d. e.

Managed APs SAN Powerline networking Wireless LANs Powertrain LANs

Answer: Difficulty: Reference: L.O.:

a Medium Designing User Access with Wireless Ethernet Be able to design wireless Ethernet LANs

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63. Standard voice-grade twisted-pair wires. a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

a Easy LAN Components Understand the major components of LANs

64. Old standard that is no longer in use today. a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

b Easy LAN Components Understand the major components of LANs

65. An improved version that has better insulation and a center plastic pipe inside the cable to keep the individual wires in place and reduce noise from cross talk. a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

c Easy LAN Components Understand the major components of LANs

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66. Has a maximum range of 55 meters. a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

d Easy LAN Components Understand the major components of LANs

67. Has a maximum range of 15 meters. a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

e Easy LAN Components Understand the major components of LANs

68. Typically used between networking devices that are near each other (e.g., in a rack or data center). a. b. c. d. e.

Category 1 cable Category 2 cable Category 5e cable Category 6 cable Category 7 cable

Answer: Difficulty: Reference: L.O.:

e Easy LAN Components Understand the major components of LANs

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Chapter 8 Backbone Networks True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. A backbone network is a high-speed network that connects many networks.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the Internetworking devices used in BNs

2. Backbone networks typically use lower speed circuits to interconnect a series of LANs and provide connections to other backbone networks.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the Internetworking devices used in BNs

3. A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the routed backbone architecture

4. One basic component of a backbone network is the hardware device that connects other networks to the backbone.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the routed backbone architecture

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5. Switches and routers are devices that can connect networks to the BN. Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the Internetworking devices used in BNs

6. The cable to connect BNs is usually twisted pair.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the best practice recommendations for backbone design

7. A hardware device that operates at the application layer is a router.

Answer: Difficulty: Reference: L.O.:

False Medium Routed Backbones Understand the routed backbone architecture

8. Routers can only connect the same type of cable.

Answer: Difficulty: Reference: L.O.:

False Easy Routed Backbones Understand the routed backbone architecture

9. Routers use network layer address to forward packets between network segments.

Answer: Difficulty: Reference: L.O.:

True Medium Routed Backbones Understand the routed backbone architecture

10. Routers operate at the application layer.

Answer: Difficulty: Reference: L.O.:

False Medium Routed Backbones Understand the routed backbone architecture

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11. Routers connect two or more network segments that use the same or different data link protocols, but the same network protocol.

Answer: Difficulty: Reference: L.O.:

True Medium Routed Backbones Understand the routed backbone architecture

12. One difference between a switch and a router is that a router will only process messages addressed to the router (at layer 2), while a switch processes all messages.

Answer: Difficulty: Reference: L.O.:

True Easy Routed Backbones Understand the routed backbone architecture

13. Layer-3 switches switch messages based only on their data link layer address.

Answer: Difficulty: Reference: L.O.:

False Easy Switched Backbones Understand the switched backbone architecture

14. Routed backbones use switches that move packets based on data link layer addresses.

Answer: Difficulty: Reference: L.O.:

False Medium Routed Backbones Understand the routed backbone architecture

15. The distribution layer of a backbone connects LANs together.

Answer: Difficulty: Reference: L.O.:

True Easy Switched Backbones Understand the switched backbone architecture

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16. The primary advantage of a routed backbone is that it clearly segments each part of the network connected to the backbone because each segment has its own subnet addresses that can be managed separately.

Answer: Difficulty: Reference: L.O.:

True Medium Routed Backbones Understand the routed backbone architecture

17. One advantage of a routed backbone is that is requires little management.

Answer: Difficulty: Reference: L.O.:

False Easy Routed Backbones Understand the routed backbone architecture

18. A routed backbone tends to be used more for large networks than VLANs, although VLAN high-speed switches and this new type of LAN-BN architecture are now being considered.

Answer: Difficulty: Reference: L.O.:

True Easy Virtual LANs Understand Virtual LAN architecture

19. A switched backbone uses a bus topology Answer: Difficulty: Reference: L.O.:

False Easy Switched Backbones Understand the switched backbone architecture

20. A room that contains a rack of equipment for a rack-based collapsed backbone is also called the main distribution facility (MDF) or central distribution facility (CDF).

Answer: Difficulty: Reference: L.O.:

True Easy Switched Backbones Understand the switched backbone architecture

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21. A key advantage of a chassis switch is its flexibility.

Answer: Difficulty: Reference: L.O.:

True Easy Switched Backbones Understand the switched backbone architecture

22. A VLAN network assigns computers to LAN segments by hardware.

Answer: Difficulty: Reference: L.O.:

False Easy Virtual LANs Understand Virtual LAN architecture

23. A VLAN requires the computer manager to reconfigure the physical cables to the switch if a computer is moved from one port to another port on a switch.

Answer: Difficulty: Reference: L.O.:

False Medium Virtual LANs Understand Virtual LAN architecture

24. VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

Answer: Difficulty: Reference: L.O.:

True Easy Virtual LANs Understand Virtual LAN architecture

25. Many routers have more sophisticated ACL software that enables the ACL to have different rules for different interfaces, Answer: Difficulty: Reference: L.O.:

True Easy Implications for Cyber Security Be aware of ways to improve BN performance

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26. Backbone networks may also be called enterprise networks if they connect all networks within an organization.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the Internetworking devices used in BNs

27. Backbone networks typically connect many networks, including LANs. Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the Internetworking devices used in BNs

28. Backbone networks typically provide connections to other BNs, WANs, MANs, and the Internet.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the Internetworking devices used in BNs

29. Backbone networks may also be called campus networks if they connect many BNs spanning several buildings as a single location.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand the Internetworking devices used in BNs

30. Backbone networks are rarely used anymore.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the Internetworking devices used in BNs

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31. Backbone networks tend to use lower speed circuits than LANs. Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand the Internetworking devices used in BNs

32. Switches learn addresses by reading the source and destination addresses.

Answer: Difficulty: References: L.O.:

True Medium Switched Backbones Understand the switched backbone architecture

33. Switches operate at the physical layer only.

Answer: Difficulty: References: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

34. Switches connect two or more network segments that use different data link protocols.

Answer: Difficulty: References: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

35. Switches connect two or more network segments that use different network protocols.

Answer: Difficulty: References: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

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36. Switches have become less popular than hubs.

Answer: Difficulty: References: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

37. Switches are software devices.

Answer: Difficulty: References: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

38. Layer-3 switches switch messages based on their IP address.

Answer: Difficulty: Reference: L.O.:

True Medium Switched Backbones Understand the switched backbone architecture

39. Layer-3 switches can be used in place of routers.

Answer: Difficulty: Reference: L.O.:

True Medium Switched Backbones Understand the switched backbone architecture

40. Layer-3 switches function slower than routers.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

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41. Layer-3 switches have more simultaneously active ports than routers.

Answer: Difficulty: Reference: L.O.:

True Medium Switched Backbones Understand the switched backbone architecture

42. Layer-3 switches can only switch messages based on their data link layer addresses.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

43. With switched backbones, network latency (delay) is decreased in comparison to traditional (bridged or routed) backbone networks.

Answer: True Difficulty: Medium Reference: Switched Backbones L.O.: Understand the switched backbone architecture

44. With switched backbones, each connection into the switch is a separate point-to-point circuit, which supports simultaneous access by the LANs connected to the switch.

Answer: True Difficulty: Medium Reference: Switched Backbones L.O.: Understand the switched backbone architecture

45. With switched backbones, there are many more networking devices in a switched backbone network compared to the number of LAN.s attaching to it.

Answer: False Difficulty: Medium Reference: Switched Backbones L.O.: Understand the switched backbone architecture

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46. Switched backbones use a star topology.

Answer: True Difficulty: Medium Reference: Switched Backbones L.O.: Understand the switched backbone architecture

47. With switched backbones, the backbone essentially exists in the switch; there is no backbone cable.

Answer: True Difficulty: Medium Reference: Switched Backbones L.O.: Understand the switched backbone architecture

48. Switched backbones place all network devices for one part of the building physically in the same room, often in a rack of equipment.

Answer: Difficulty: Reference: L.O.:

True Medium Switched Backbones Understand the switched backbone architecture

49. Switched backbones have an advantage of requiring less cable.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

50. Switched backbones make it more difficult to move computers from one LAN to another.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

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51. With switched backbones, network capacity is always tied to the physical location of the computers.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

52. Switched backbones are harder to maintain and upgrade than a BN that is not rackbased.

Answer: Difficulty: Reference: L.O.:

False Medium Switched Backbones Understand the switched backbone architecture

53. Several switches are used to build a VLAN. Answer: Difficulty: Reference: L.O.:

True Medium Virtual LANs Understand Virtual LAN architecture

54. The switches in the VLAN can send packets among themselves in a way that identifies the VLAN to which the frame belongs.

Answer: Difficulty: Reference: L.O.:

True Medium Virtual LANs Understand Virtual LAN architecture

55. In some multi-switch VLANs, the Ethernet frame is modified based on the emerging IEEE 802.1q standard.

Answer: Difficulty: Reference: L.O.:

True Medium Virtual LANs Understand Virtual LAN architecture

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56. In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet packet.

Answer: Difficulty: Reference: L.O.:

True Medium Virtual LANs Understand Virtual LAN architecture

57. VLAN configurations are limited to spanning over no more than two switches.

Answer: Difficulty: Reference: L.O.:

False Medium Virtual LANs Understand Virtual LAN architecture

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. Which of the following is not true about backbone networks? a. They may also be called enterprise networks if they connect all networks within an organization. b. They typically connect many networks, including LANs. c. They typically provide connections to other BNs, WANs, MANs, and the Internet. d. They may also be called campus networks if they connect many BNs spanning several buildings as a single location. e. They tend to use lower speed circuits than LANs. Answer: Difficulty: Reference: L.O.:

e Medium Introduction Understand the Internetworking devices used in BNs

2. Which of the following is not a type of hardware device that can be used to interconnect networks? a. b. c. d. e.

layer 3 switches routers dumb terminals layer 2 switches all of the above can be used

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Understand the Internetworking devices used in BNs

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3. Switches: a. b. c. d. e.

learn addresses by reading the source and destination addresses. operate at the physical layer only. connect two or more network segments that use different data link protocols. connect two or more network segments that use different network protocols. have become less popular than hubs.

Answer: Difficulty: References: L.O.:

a Medium Switched Backbones Understand the switched backbone architecture

4. Routers: a. b. c. d. e.

operate at the application layer. operate only at the physical layer. cannot connect two or more networks that use the same type of cable. may also be called TCP/IP gateways. operate only at the data link layer.

Answer: Difficulty: Reference: L.O.:

d Medium Routed Backbones Understand the routed backbone architecture

5. Which of the following is not a way that a router differs from a switch? a. b. c. d. e.

Routers can connect two or more networks that use the same data link protocol.

Routers only process messages that are specifically addressed to it.

Routers operate at the network layer.

Routers perform more processing on each message than switches do.

Routers can choose the “best” route between networks for forwarding a packet.

Answer: Difficulty: Reference: L.O.:

a Hard Routed Backbones Understand the routed backbone architecture

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6. Which of the following is not true about Layer-3 switches? a. b. c. d. e.

They switch messages based on their IP address.

They can be used in place of routers.

They function faster than routers.

They have more simultaneously active ports than routers.

They can only switch messages based on their data link layer addresses.

Answer: Difficulty: Reference: L.O.:

e Medium Switched Backbones Understand the switched backbone architecture

7. Which of the following is a fundamental backbone network architecture? a. b. c. d. e.

Bridged backbone Virtual LAN Hubbed backbone Gatewayed backbone Virtual backbone

Answer: Difficulty: Reference: L.O.:

b Easy Routed Backbones Understand the routed backbone architecture

8. Which of the following is not a technology layer that is considered when designing backbone networks? a. b. c. d. e.

access layer distribution layer decentralized layer core layer none of the options

Answer: Difficulty: Reference: L.O.:

c Medium Switched Backbones Understand the switched backbone architecture

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9. A subnetted or hierarchical backbone can also be called: a. b. c. d. e.

Bridged backbone Virtual LAN Hubbed backbone Collapsed backbone Routed backbone

Answer: Difficulty: Reference: L.O.:

e Medium Routed Backbone Understand the routed backbone architecture

10. _________ move packets along the backbone based on their network layer address. a. b. c. d. e.

Bridged backbones Hubbed backbones Multistation access unit backbones Routed backbones NIC backbones

Answer: Difficulty: Reference: L.O.:

d Medium Routed Backbones Understand the routed backbone architecture

11. Routers: a. b. c. d. e.

connect different IP networks or subnetworks typically do not require any configuration by the network administrator use data link layer addresses to move packets that leave the subnet typically require only one TCP/IP address do less processing on packets than a layer 2 switch does

Answer: Difficulty: Reference: L.O.:

a Medium Routed Backbones Understand the routed backbone architecture

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12. Two primary disadvantages to the ______ BN type are that the routers in the network impose time delays, and routers are typically more expensive and require more management than switches. a. b. c. d. e.

bridged backbone virtual LAN hubbed backbone collapsed backbone routed backbone

Answer: Difficulty: Reference: L.O.:

e Medium Routed Backbones Understand the routed backbone architecture

13. A __________ type of BN has a star topology with a switch at its center resulting in all devices on the BN segment being part of the same IP network. a. b. c. d. e.

Bridged backbone Virtual LAN Hubbed backbone Switched backbone Routed backbone

Answer: Difficulty: Reference: L.O.:

d Easy Switched Backbones Understand the switched backbone architecture

14. Switched backbone networks: a. b. c. d. e.

always use a ring topology are the least common type of BN used in one building use a star topology with one device, usually a switch switch the traffic based on layer 3 addresses require much more management that do routed backbone networks

Answer: Difficulty: Reference: L.O.:

c Medium Switched Backbones Understand the switched backbone architecture

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15. Which of the following is not true about switched backbones? a. Network latency (delay) is decreased in comparison to traditional (bridged or routed) backbone networks. b. Each connection into the switch is a separate point-to-point circuit, which supports simultaneous access by the LANs connected to the switch. c. There are many more networking devices in a switched backbone network compared to the number of LAN.s attaching to it. d. The use a star topology e. The backbone essentially exists in the switch; there is no backbone cable.

Answer: Difficulty: Reference: L.O.:

c Medium Switched Backbones Understand the switched backbone architecture

16. Which of the following is true regarding switched backbones? a. They place all network devices for one part of the building physically in the same room, often in a rack of equipment. b. They have an advantage of requiring less cable. c. They make it more difficult to move computers from one LAN to another. d. Network capacity is always tied to the physical location of the computers. e. They are harder to maintain and upgrade than a BN that is not rack-based.

Answer: Difficulty: Reference: L.O.:

a Medium Switched Backbones Understand the switched backbone architecture

17. Associated with a switched backbone, MDF is an acronym for: a. b. c. d. e.

multi-station device foundation. main distribution facility. manual data frequency. multiplexer downstream flow. maximum data facility.

Answer: Difficulty: Reference: L.O.:

b Medium Switched Backbones Understand the switched backbone architecture

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18. A _____________ type of BN is a new type of LAN/BN architecture made possible by intelligent, high-speed switches that assign computers to LAN segments via software, rather than by hardware. a. b. c. d. e.

Bridged backbone Virtual LAN Hubbed backbone Collapsed backbone Routed backbone

Answer: Difficulty: Reference: L.O.:

b Easy Virtual LANs Understand Virtual LAN architecture

19. Which of the following is not true about multi-switch VLANs? a. Several switches are used to build a VLAN. b. The switches in the VLAN can send packets among themselves in a way that identifies the VLAN to which the frame belongs. c. In some multi-switch VLANs, the Ethernet frame is modified based on the emerging IEEE 802.1q standard. d. In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet packet. e. VLAN configurations are limited to spanning over no more than two switches.

Answer: Difficulty: Reference: L.O.:

e Medium Virtual LANs Understand Virtual LAN architecture

20. Which of the following would be least effective in improving backbone performance? a. b. c. d. e.

upgrading memory for devices in the network changing the demand placed on the network adding new keyboards to the client computers upgrading the circuits between devices improving devices in the network

Answer: Difficulty: Reference: L.O.:

c Easy Improving Backbone Performance Be aware of ways to improve BN performance

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21. Circuit capacity on a backbone network will not be improved by: a. b. c. d. e.

going from 100Base-T Ethernet to 10Base-T Ethernet. going from 100Base-T Ethernet to gigabit Ethernet. adding additional circuits alongside heavily used ones. replacing a shared circuit backbone with a switched circuit backbone. providing a faster circuit to the server.

Answer: Difficulty: Reference: L.O.:

a Medium Improving Backbone Performance Be aware of ways to improve BN performance

22. Device performance on a backbone network will not be improved by: a. using the same protocols in the backbone and the LANs. b. using static routing in low to moderate traffic conditions. c. ensuring that backbone devices have sufficient memory so that packets do not have to be retransmitted by the sender. d. translating packets from one protocol to another as they enter the BN. e. none of the options.

Answer: Difficulty: Reference: L.O.:

d Medium Improving Backbone Performance Be aware of ways to improve BN performance

23. Network demand will not be reduced by: a. restricting (or moving) applications such as desktop videoconferencing. b. using network devices to ensure that broadcast messages do not go to other networks. c. encouraging the use of applications such as medical imaging. d. sending status information to all computers on all LANs in the backbone network. e. restricting (or moving) applications such as multimedia.

Answer: Difficulty: Reference: L.O.:

c Medium Improving Backbone Performance Be aware of ways to improve BN performance

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24. Which of the following would not be part of an “ideal” backbone design? a. b. c. d.

Access layer composed of 10/100 layer 2 Ethernet switches Distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T Redundant switches Core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over fiber e. Coax cabling throughout LANs and BN Answer: Difficulty: Reference: L.O.:

e Medium Improving Backbone Performance Be aware of ways to improve BN performance

25. The backbone architecture layer that is closest to the users is the a. b. c. d. e.

Access layer Distribution layer Core layer Privacy layer Switched layer

Answer: Difficulty: Reference: L.O.:

a Easy Switched Backbones Understand the switched backbone architecture

26. The _______ is the part of the backbone that connects the LANs together. a. b. c. d. e.

Access layer Distribution layer Core layer Privacy layer Switched layer

Answer: Difficulty: Reference: L.O.:

b Easy Switched Backbones Understand the switched backbone architecture

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27. The _________ is the part of the backbone that connects the different backbones together. a. b. c. d. e.

Access layer Distribution layer Core layer Privacy layer Switched layer

Answer: Difficulty: Reference: L.O.:

c Easy Switched Backbones Understand the switched backbone architecture

28. With a switched backbone network, the equipment is usually placed in a ______. a. b. c. d. e.

server NIC cabinet basement rack

Answer: Difficulty: Reference: L.O.:

e Medium Switched Backbones Understand the switched backbone architecture

29. Devices in a rack are connected together using ___________. a. b. c. d. e.

patch cables string servers modules chassis switches

Answer: Difficulty: Reference: L.O.:

a Medium Switched Backbones Understand the switched backbone architecture

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30. Using ______ capabilities, network managers can connect VOIP phones directly into a VLAN switch and configure the switch to reserve sufficient network capacity so that they will always be able to send and receive voice messages. a. backbone b. switched c. routed d. QoS e. access Answer: Difficulty: Reference: L.O.:

d Medium Virtual LANs Understand Virtual LAN architecture

31. Computers can be assigned to a VLAN based on the ________. a. b. c. d. e.

IEEE 802.1q standard NIC interface physical port on the switch IEEE 802.3 standard physical location of the computer

Answer: Difficulty: Reference: L.O.:

c Medium Virtual LANs Understand Virtual LAN architecture

32. The biggest drawbacks to VLANs are their_________________. a. b. c. d. e.

cost and management complexity size and contention contention and cost learning curve and contention speed and size

Answer: Difficulty: Reference: L.O.:

a Medium The Best Practice Backbone Design Be aware of ways to improve BN performance

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33. VLANs prioritize traffic based on the ______. a. b. c. d. e.

IEEE 802.1q standard IEEE 802.11 standard VLAN size multiswitch allocation switch dynamics

Answer: Difficulty: Reference: L.O.:

a Medium Virtual LANs Understand Virtual LAN architecture

34. Most backbone devices are store-and-forward devices. One simple way to improve performance is to ensure that they have ________________. a. b. c. d. e.

enough ports sufficient memory twisted pair connections large wheels IEEE 802.11

Answer: Difficulty: Reference: L.O.:

b Medium The Best Practice Backbone Design Be aware of ways to improve BN performance

35. As security becomes more important, most routers now have software that enables the network manager to create a(n) _______ that specifies what traffic the router should allow through and what traffic the router should block. a. b. c. d. e.

module access control list MDF VLAN ID VLAN tag

Answer: Difficulty: Reference: L.O.:

b Medium Implications for Cyber Security Be aware of ways to improve BN performance

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Chapter 8 Test Bank

36. _______ are the most secure type of backbone because they enable ACL and other security measures to be applied at the switch level. a. b. c. d. e.

VLANs Switched backbones Routed backbones MDF backbones Ethernet backbones

Answer: Difficulty: Reference: L.O.:

a Medium Implications for Cyber Security Be aware of ways to improve BN performance

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Chapter 9 Wide Area Networks True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. In constructing Wide Area Networks, many organizations do not build their own long distance communication circuits.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the best practice recommendations for WAN design

2. WANs can connect BNs across distances that can span up to thousands of miles.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the best practice recommendations for WAN design

3. Common carriers sell or lease communication services and facilities to the public.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand the best practice recommendations for WAN design

4. A common carrier that provides long distance services is typically called a local exchange carrier.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the best practice recommendations for WAN design

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5. A dedicated circuit is usually not available late at nights or on weekends.

Answer: Difficulty: Reference: L.O.:

False Easy Dedicated Circuit Networks Understand dedicated-circuit services and architectures

6. A WAN with a ring topology can use full or half-duplex circuits Answer: Difficulty: Reference: L.O.:

True Medium Dedicated Circuit Networks Understand dedicated-circuit services and architectures

7. A disadvantage of a star architecture is that the failure of one circuit will disrupt the entire network.

Answer: Difficulty: Reference: L.O.:

False Medium Dedicated Circuit Networks Understand dedicated-circuit services and architectures

8. Full mesh networks are inexpensive.

Answer: Difficulty: Reference: L.O.:

False Medium Dedicated Circuit Networks Understand dedicated-circuit services and architectures

9. Full mesh design networks are more common than partial mesh design networks.

Answer: Difficulty: Reference: L.O.:

False Medium Dedicated Circuit Networks Understand dedicated-circuit services and architectures

10. T carrier circuits can only be used to transmit voice.

Answer: Difficulty: Reference: L.O.:

False Easy Dedicated Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

11. A T1 circuit provides a data rate of 1.544Mbps.

Answer: Difficulty: Reference: L.O.:

True Easy Dedicated Circuit Networks Understand dedicated-circuit services and architectures

12. SONET is made up of high-speed dedicated circuits that incorporate inverse multiplexing (IMUX) for all levels above the OC-1 level.

Answer: Difficulty: Reference: L.O.:

True Medium Dedicated Circuit Networks Understand dedicated-circuit services and architectures

13. An OC-1 circuit provides a data rate of 155 Mbps.

Answer: Difficulty: Reference: L.O.:

False Easy Dedicated Circuit Networks Understand dedicated-circuit services and architectures

14. To connect into a packet switched network, a network terminator is generally used.

Answer: Difficulty: Reference: L.O.:

False Medium Packet-Switched Networks Understand packet-switched services and architectures

15. Packet switched networks enable packets from separate messages or separate organizations to be interleaved for transmission.

Answer: Difficulty: Reference: L.O.:

True Easy Packet-Switched Networks Understand packet-switched services and architectures

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Chapter 9 Test Bank

16. Datagrams are connection-oriented.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

17. The committed information rate (CIR) in a permanent virtual circuit is the maximum allowable rate that the network will attempt to provide.

Answer: Difficulty: Reference: L.O.:

False Medium Packet-Switched Networks Understand packet-switched services and architectures

18. Frame relay is a reliable packet service.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

19. Ethernet services are now being successfully used in WAN environments.

Answer: Difficulty: Reference: L.O.:

True Easy Packet-Switched Networks Understand packet-switched services and architectures

20. Virtual private networks permit users to create permanent virtual circuits, or tunnels, through the Internet.

Answer: Difficulty: Reference: L.O.:

True Easy Virtual Private Networks Understand Internet-based VPN services and architectures

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Chapter 9 Test Bank

21. MPLS operate at layer 4.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

22. VPNs offer high security because they operate through the Internet.

Answer: Difficulty: Reference: L.O.:

False Easy Virtual Private Networks Understand Internet-based VPN services and architectures

23. An intranet VPN connects different organizations over the Internet.

Answer: Difficulty: Reference: L.O.:

False Easy Virtual Private Networks Understand Internet-based VPN services and architectures

24. The market for WAN services has declined dramatically over the past few years.

Answer: Difficulty: Reference: L.O.:

False Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

25. Most common carriers charge per packet.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

26. Frame relay is no longer available.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

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Chapter 9 Test Bank

27. Multiprotocol label switching (MPLS) is a technology that is classified within the 5-layer network model.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

28. The Ethernet circuit data rate is fixed and cannot be changed.

Answer: Difficulty: Reference: L.O.:

False Easy Packet-Switched Networks Understand packet-switched services and architectures

29. Virtual private network (VPN) services are much more expensive than dedicated circuit or packet-switched services.

Answer: Difficulty: Reference: L.O.:

False Easy Virtual Private Networks Understand Internet-based VPN services and architectures

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Chapter 9 Test Bank

MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. ____________ are companies that build a data and telecommunications infrastructure from which other companies can lease services for WANs and MANs. a. b. c. d. e.

Common carriers Router manufacturers Standards organizations CSUs PUCs

Answer: a Difficulty: Easy Reference: Introduction L.O.: Understand the best practice recommendations for WAN design

2. Each state or Canadian province has its own ___________ to regulate communications within its borders. a. b. c. d. e.

CRTC Federal Communications Commission common carriers public utilities commission PTT

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Understand the best practice recommendations for WAN design

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Chapter 9 Test Bank

3. The _________________ is a United States government agency that regulates voice and data communication. a. b. c. d. e.

PSTN FCC CRTC CSU POTS

Answer: Difficulty: Reference: L.O.:

b Medium Introduction Understand the best practice recommendations for WAN design

4. A ___________ is a device that permits a customer to connect to a digital T-carrier service. a. b. c. d. e.

modem codec CSU/DSU NIC ATM

Answer: Difficulty: Reference: L.O.:

c Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

5. Which of the following is not a basic architecture for dedicated circuit networks? a. b. c. d. e.

ring partial mesh bus star full mesh

Answer: Difficulty: Reference: L.O.:

c Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

6. A ________ geometric layout connects all computers in a closed loop, with each computer linked to the next usually with a series of point-to-point dedicated circuits. a. b. c. d. e.

bus design star design full mesh design ring design partial mesh design

Answer: Difficulty: Reference: L.O.:

d Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

7. In a ring architecture WAN, a. b. c. d.

messages can take a long time to travel from the sender to the receiver a message arrives at all computers on the network simultaneously messages always arrive faster than in other types of layouts messages are delivered directly from sender to receiver because there is a pointto-point connection directly between each sender and each receiver e. messages always take one second to travel between sender and receiver Answer: Difficulty: Reference: L.O.:

a Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

8. In a ring architecture WAN, a. b. c. d.

failure in one circuit means that the network can most likely continue to function failure in one circuit always means that the network will cease to function failure in one computer always means that the network will cease to function failure in one circuit means that there will not be any increased traffic delays in the network e. failure in one computer always means that messages will stop at that computer since it would be impossible to re-route traffic Answer: Difficulty: Reference: L.O.:

a Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

9. A star architecture: a. connects all computers in a closed loop b. connects all computers off a backbone circuit c. connects all computers to one central computer that routes messages to the appropriate computer d. all of the above e. none of the above Answer: Difficulty: Reference: L.O.:

c Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

10. A _______ geometric layout for a WAN connects all computers to one central computer that routes messages to the appropriate computer, usually via a series of point-to-point dedicated circuits. a. b. c. d. e.

ring design mesh design bus design star design mesh design

Answer: Difficulty: Reference: L.O.:

d Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

11. A star topology is: a. difficult to manage because the central computer receives and routes all messages in the network b. dependent upon the capacity of the central computer for its performance c. always slower than a ring network d. less susceptible to traffic problems than other architectures e. not affected if the central computer fails Answer: Difficulty: Reference: L.O.:

b Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

12. In ______ geometric layout for a network, every computer is connected to every other computer often by point-to-point dedicated circuits. a. b. c. d. e.

full mesh design ring design star design bus design partial mesh design

Answer: Difficulty: Reference: L.O.:

a Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

13. Mesh networks: a. usually provide relatively long routes through the network (compared to ring networks) b. typically contain more circuits in the network than in star or ring networks c. do not use decentralized routing d. typically are less expensive than ring networks e. do not have many possible routes through the network to prevent one circuit from becoming overloaded Answer: Difficulty: Reference: L.O.:

b Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

14. _____ are dedicated digital circuits that are the most commonly used form of dedicated circuit services in North America today. a. b. c. d. e.

Wideband analog services SMDS ATM T-carrier services ISDN

Answer: Difficulty: Reference: L.O.:

d Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

15. The data rate for a T-1 circuit in North America is: a. b. c. d. e.

1.544 Mbps 6.312 Mbps 44.376 Mbps 274.176 Mbps 1.544 Gbps

Answer: Difficulty: Reference: L.O.:

a Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

16. In North America, a T1 circuit has ______ 64Kbps channels. a. b. c. d. e.

2 30 24 12 36

Answer: Difficulty: Reference: L.O.:

c Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

17. The data rate for a T-3 circuit in North America is: a. b. c. d. e.

1.544 Mbps 6.312 Mbps 44.376 Mbps 274.176 Mbps 1.544 Gbps

Answer: Difficulty: Reference: L.O.:

c Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

18. SONET: a. is a standard for optical transmission that currently operates at Terabit per second speeds b. is almost identical to the ITU-T standard, synchronous digital hierarchy (SDH) c. uses existing copper cabling and the PSTN network d. refers to Sprint Overall Network e. is not currently available, even in large cities Answer: Difficulty: Reference: L.O.:

b Hard Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

19. Which of the following is not a benefit of packet switched services? a. The data transmission rates tend to be lower than dial-up or dedicated circuits. b. You do not have to set up dedicated circuits between each endpoint from which you wish to transmit and receive data and/or voice. c. You have the flexibility to send data through a temporary circuit between two connections that will be disconnected as soon as the digital transmission is completed. d. All circuits are less susceptible to a great deal of noise because they are digital. e. You do not have to specify all the interconnecting services you need for your WAN when you buy the service.

Answer: Difficulty: Reference: L.O.:

a Medium Packet – Switched Networks Understand packet-switched services and architectures

20. A _____________ is a user’s connection into a packet switched service. a. b. c. d. e.

packet analog/digital device packet asynchronous/discrete device packet asymmetric/data transmission device packet assembly/disassembly device packet analyzer/decoder device

Answer: Difficulty: Reference: L.O.:

d Medium Packet – Switched Networks Understand packet-switched services and architectures

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Chapter 9 Test Bank

21. Which of the following type of networks permit packets from separate messages to be interleaved? a. b. c. d. e.

circuit switched network dedicated circuit network dial up circuit network packet switched network Fractional T-1 network

Answer: Difficulty: Reference: L.O.:

d Easy Packet – Switched Networks Understand packet-switched services and architectures

22. A _______ is a connectionless method of sending data packets on a packet switched service. a. b. c. d. e.

bursty packet virtual circuit datagram histogram permanent virtual circuit

Answer: Difficulty: Reference: L.O.:

c Medium Packet – Switched Networks Understand packet-switched services and architectures

23. A _________ is a connection-oriented approach to sending packets on a packet switched service. a. b. c. d. e.

permanent virtual circuit datagram histogram bursty packet fractional T-1 network

Answer: Difficulty: Reference: L.O.:

a Medium Packet – Switched Networks Understand packet-switched services and architectures

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Chapter 9 Test Bank

24. In a packet switched network, permanent virtual circuits that look very similar to a _____________ (for hardware-based dedicated circuits) move packets through the network. a. b. c. d. e.

cloud-based ring design cloak-based mesh design cloud-based mesh design common carrier ring design common carrier bus design

Answer: Difficulty: Reference: L.O.:

c Medium Packet – Switched Networks Understand packet-switched services and architectures

25. ______________ are sometimes called private line services. a. b. c. d. e.

WANs LANs Circuit-switched networks Dedicated-circuit networks Routed-backbone networks

Answer: Difficulty: Reference: L.O.:

d Medium Packet – Switched Networks Understand packet-switched services and architectures

26. OC-3072 has a data rate of a. b. c. d. e.

159.25 Gbps 39.813 Gbps 1.544 Mbps 100 Mbps 1.244 Gbps

Answer: Difficulty: Reference: L.O.:

a Medium Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

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Chapter 9 Test Bank

27. _____________ is sometimes called a Layer 2.5 technology. a. b. c. d. e.

ATM MPLS Ethernet TCP IP

Answer: Difficulty: Reference: L.O.:

b Medium Packet – Switched Networks Understand packet-switched services and architectures

28. Ethernet/IP packet networks: a. b. c. d. e.

are supported with gigabit fiber optic networks in large cities are offered only by the common carriers use token ring layer 2 media access control use IPX/SPX protocols provide CIR up to a maximum of 1.544 Mbps

Answer: Difficulty: Reference: L.O.:

a Medium Packet – Switched Networks Understand packet-switched services and architectures

29. A _______________ is a particular type of network that uses circuits that run over the Internet but that appears to the user to be a private network. a. b. c. d. e.

local carrier network virtual private network integrated service digital network software defined network SONET network

Answer: Difficulty: Reference: L.O.:

b Medium Virtual Private Networks Understand Internet-based VPN services and architectures

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Chapter 9 Test Bank

30. With a virtual private network, users create permanent virtual circuits through the Internet called: a. b. c. d. e.

bursts cells tunnels rings clouds

Answer: Difficulty: Reference: L.O.:

c Medium Virtual Private Networks Understand Internet-based VPN services and architectures

31. Which of the following is a primary advantage of a VPN in comparison to a private WAN connection? a. b. c. d. e.

low cost inflexibility unpredictable traffic congestion security complexity to the user

Answer: Difficulty: Reference: L.O.:

a Easy Virtual Private Networks Understand Internet-based VPN services and architectures

32. _____________ is a common standard for use by layer 2 access VPNs for encapsulation. a. b. c. d. e.

L2TP VPN2 Encapsule2 TCP/IP PPP

Answer: Difficulty: Reference: L.O.:

a Medium Virtual Private Networks Understand Internet-based VPN services and architectures

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Chapter 9 Test Bank

33. Which of the following is not a type of VPN? a. b. c. d. e.

intranet VPN extranet VPN access VPN T-1 VPN a VPN that enables employees to access an organization’s network from a remote location

Answer: Difficulty: Reference: L.O.:

d Medium Virtual Private Networks Understand Internet-based VPN services and architectures

34. __________ is a term that refers to the time delay in converting input packets to output packets. a. b. c. d. e.

Transfer mode Latency Burstiness Cell relay Frame relay

Answer: Difficulty: Reference: L.O.:

b Medium Improving WAN Performance Be familiar with how to improve WAN performance

35. The performance of WANs can be improved by: a. b. c. d. e.

upgrading the circuits between the computers increasing the demand placed on the network downgrading the circuits between the computers downgrading the devices that provide access to the circuits increasing network traffic

Answer: Difficulty: Reference: L.O.:

a Easy Improving WAN Performance Be familiar with how to improve WAN performance

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Chapter 9 Test Bank

36. Dynamic routing: a. b. c. d.

imposes an overhead cost by increasing network traffic decreases performance in networks which have many possible routes decreases performance in networks with “bursty” traffic does not add to the network traffic and should be used in all network environments e. is another term for static routing in WANs Answer: Difficulty: Reference: L.O.:

a Medium Improving WAN Performance Be familiar with how to improve WAN performance

37. Which of the following is not a way to reduce network demand? a. shifting network usage from high cost times to lower cost times b. using data compression techniques for all data in the network c. requiring a network impact statement for all application software developed by the organization d. moving data further from the applications and people who use them e. shifting network usage from peak to lower demand times Answer: Difficulty: Reference: L.O.:

d Medium Improving WAN Performance Be familiar with how to improve WAN performance

38. Which of the following is not a key issue to be considered when selecting a WAN service? a. b. c. d. e.

prestige value of using a particular common carrier flexibility capacity control reliability

Answer: Difficulty: Reference: L.O.:

a Medium The Best Practice WAN Design Understand the best practice recommendations for WAN design

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Chapter 9 Test Bank

39. Which WAN technology is designed to work with a variety of commonly used layer2 protocols and is sometimes called a layer-2.5 technology because it inserts a 4-byte header that contains its own information between the layer-2 frame and the layer-3 IP packet? a. b. c. d. e.

Ethernet TCP MPLS IRoute T1

Answer: Difficulty: Reference: L.O.:

c Medium Packet – Switched Networks Understand packet-switched services and architectures

40. Which of the following is not a type of WAN services that is used to connect company offices to each other or to cloud providers. a. b. c. d.

Dedicated-circuit services TCP Packet-switched services Virtual private network

Answer: Difficulty: Reference: L.O.:

b Easy Dedicated-Circuit Networks Understand dedicated-circuit services and architectures

41. A Software Defined WAN (SDWAN) provides four benefits. Which of the following is not one of those benefits? a. b. c. d. e:

Centralized management Lower cost More visibility over network traffic Good security Flexibility

Answer: Difficulty: Reference: L.O.:

e Easy The Best Practice WAN Design Understand the best practice recommendations for WAN design

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Chapter 9 Test Bank

42. The architecture of an SDWAN has three parts, which are also called planes. Which of the following is not one of those planes? a. b. c. d.

Management plane Control plane Encryption plane Data plane

Answer: Difficulty: Reference: L.O.:

c Easy The Best Practice WAN Design Understand the best practice recommendations for WAN design

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Chapter 9 Test Bank

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Chapter 9 Test Bank

Chapter 10 The Internet True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. The Internet is one large network.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Understand the overall design of the Internet

2. The Internet is flat in structure.

Answer: False Difficulty: Easy Reference: Introduction L.O.: Understand the overall design of the Internet

3. Tier 1 service providers connect together and exchange data at IXPs. Answer: True Difficulty: Easy Reference: How the Internet Works L.O.: Understand the overall design of the Internet

4. IXPs were originally designed to connect only tier 3 ISPs. Answer: False Difficulty: Easy Reference: How the Internet Works L.O.: Understand the overall design of the Internet

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Chapter 10 Test Bank

5. Peering means that a tier 1 ISP does not charge another tier 1 ISP to transmit its messages.

Answer: True Difficulty: Easy Reference: How the Internet Works L.O.: Understand the overall design of the Internet

6. A point of presence is the place at which the ISP provides services to its customers.

Answer: True Difficulty: Easy Reference: How the Internet Works L.O.: Understand the overall design of the Internet

7. Technologies such as DSL and cable modem are called narrowband technologies.

Answer: False Difficulty: Easy Reference: How the Internet Works L.O.: Be familiar with DSL, cable modem, and fiber to the home

8. Digital Subscriber Line is a family of multipoint technologies.

Answer: Difficulty: Reference: L.O.:

False Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

9. To use DSL, a customer needs a DSL Access Multiplexer installed at his or her location.

Answer: Difficulty: Reference: L.O.:

False Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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Chapter 10 Test Bank

10. ADSL uses FDM to create three channels over the one local loop circuit: one for voice, one for upstream data, and one for downstream data.

Answer: Difficulty: Reference: L.O.:

True Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

11. The phone line from the DSL customer to the telephone company end office is referred to as the “remote loop”.

Answer: Difficulty: Reference: L.O.:

False Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

12. The most common type of DSL today is ADSL. Answer: Difficulty: Reference: L.O.:

True Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

13. The most common cable modem standard is Data over Cable Service Interface Specification.

Answer: Difficulty: Reference: L.O.:

True Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

14. The device similar to a DSL router, but used in a FTTH environment is called an optical network unit.

Answer: Difficulty: Reference: L.O.:

True Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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Chapter 10 Test Bank

15. A cable company distribution hub includes a combiner and a cable modem termination system.

Answer: Difficulty: Reference: L.O.:

True Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

16. In a DSL environment, the line splitter and DSL modem are always two separate devices.

Answer: Difficulty: Reference: L.O.:

False Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

17. The Internet Engineering Steering Group provides strategic architectural oversight for the Internet.

Answer: Difficulty: Reference: L.O.:

False Medium The Future of the Internet Be familiar with possible future directions of the Internet

18. The RFCs that form the basis for Internet standards are developed by the IETF and its working groups.

Answer: Difficulty: Reference: L.O.:

True Easy The Future of the Internet Be familiar with possible future directions of the Internet

19. Each of the networks in Internet 2 has a set of access points called terapops.

Answer: Difficulty: Reference: L.O.:

False Easy The Future of the Internet Be familiar with possible future directions of the Internet

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Chapter 10 Test Bank

20. With regards to DSL, on a circuit, the shorter the distance, the higher the speed.

Answer: Difficulty: Reference: L.O.:

True Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

21. With regards to DSL, on a circuit, the longer the distance, the higher the speed.

Answer: Difficulty: Reference: L.O.:

False Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

22. With regards to DSL, on a circuit, the longer the distance, less attenuation occurs.

Answer: Difficulty: Reference: L.O.:

False Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

23. With regards to DSL, on a circuit, the shorter the distance, more attenuation occurs.

Answer: Difficulty: Reference: L.O.:

False Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

24. With regards to DSL, when more attenuation occurs, higher frequency signals can be used effectively.

Answer: Difficulty: Reference: L.O.:

False Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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Chapter 10 Test Bank

MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. At the top of the Internet structure are tier 1 ___________, such as AT&T and Sprint. a. b. c. d. e.

Network Access Points Internet service providers bridges LATAs digital subscriber lines

Answer: Difficulty: Reference: L.O.:

b Easy How the Internet Works Understand the overall design of the Internet

2. Tier 1 ISPs connect together and exchange data at ___________. a. b. c. d. e.

IXPs cable modem termination system endpoints distribution hubs the Internet engineering task force headquarters the Internet Society network center

Answer: Difficulty: Reference: L.O.:

a Easy How the Internet Works Understand the overall design of the Internet

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Chapter 10 Test Bank

3. __________ has led to the belief that the Internet is “free”. a. b. c. d. e.

Encrypting Peering Bridging Tolling Polling

Answer: Difficulty: Reference: L.O.:

b Medium How the Internet Works Understand the overall design of the Internet

4. ___________ refers to the fact that ISPs do not charge one another (at the same level) for transferring messages they exchange across an NAP or MAE. a. b. c. d. e.

Popping Peering Yiping Napping Chargebacking

Answer: Difficulty: Reference: L.O.:

b Easy How the Internet Works Understand the overall design of the Internet

5. A _________ is the place at which the ISP provides services to its customers. a. b. c. d. e.

remote access point network access point cable modem termination system endpoint point-of-presence metropolitan area exchange

Answer: Difficulty: Reference: L.O.:

d Medium How the Internet Works Understand the overall design of the Internet

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6. In general, tier 3 ISPs make money by charging ________. a. b. c. d. e.

customers ICANN UCAID the DSLAM CSUs/DSUs

Answer: Difficulty: Reference: L.O.:

a Easy How the Internet Works Understand the overall design of the Internet

7. A ___________ is used by ISPs to authenticate its customers. a. b. c. d. e.

password server remote-access server. file server WAP server.

Web server

Answer: Difficulty: Reference: L.O.:

b Medium How the Internet Works Understand the overall design of the Internet

8. Which of the following is one of the tier 1 ISPs in North America? a. b. c. d. e.

IETF IEEE IAB Sprint ISOC

Answer: Difficulty: Reference: L.O.:

d Medium How the Internet Works Understand the overall design of the Internet

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Chapter 10 Test Bank

9. Technologies that provide higher-speed communications than traditional modems (e.g., DSL) are known as ______________ technologies. a. b. c. d. e.

middleband narrowband rubberband metalband broadband

Answer: Difficulty: Reference: L.O.:

e Easy Internet Access Technologies Understand the overall design of the Internet

10. Digital _________ Line is a family of point-to-point technologies designed to provide high-speed data transmission over traditional telephone lines. a. b. c. d. e.

System Satisfaction Speedy Subscriber Switch

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

11. For access to DSL, __________ equipment is installed at the customer location. a. b. c. d. e.

point-of-presence satellite dish customer premises metropolitan area exchange network access point

Answer: Difficulty: Reference: L.O.:

c Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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12. A __________ separates traditional voice telephone transmission from the data transmissions in the equipment located at the customer site for DSL. a. b. c. d. e.

line splitter V.32bis modem line analyzer main distribution frame network access point

Answer: Difficulty: Reference: L.O.:

a Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

13. Data traffic from the DSL customer premises is sent to a __________, which is located at the local carrier’s end office. a. b. c. d. e.

modem codec DSLAM NIC ATM

Answer: Difficulty: Reference: L.O.:

c Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

14. The _________ is the connection from a home or business to the telephone company end office. a. b. c. d. e.

distribution hub RFC UCAID local loop CA*net 3

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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15. A DSL modem is also known as a: a. b. c. d. e.

DSL bridge DSL switch DSL router DSL gateway DSL hub

Answer: Difficulty: Reference: L.O.:

c Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

16. At the DSL local carrier’s office, the __________ demultiplexes the data streams and converts them into digital data. a. b. c. d. e.

DSLAM GrandSlam WAP line splitter X.25 PAD

Answer: Difficulty: Reference: L.O.:

a Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

17. Peering has led to the emergence of a new organization type called the _______, which permits any ISP to connect to its network. a. b. c. d. e.

gigapop autonomous system ISP IXP Service provider

Answer: Difficulty: Reference: L.O.:

d Medium How the Internet Works Be familiar with DSL, cable modem, and fiber to the home

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18. At the DSL customer premises is a device called a(n) a. b. c. d. e.

cable modem DSLAM DSL modem Internet router DSL bridge

Answer: Difficulty: Reference: L.O.:

c Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

19. Which of the following statements is true in regards to DSL? a. b. c. d. e.

On a circuit, the shorter the distance, the higher the speed.

On a circuit, the longer the distance, the higher the speed.

On a circuit, the longer the distance, less attenuation occurs.

On a circuit, the shorter the distance, more attenuation occurs.

When more attenuation occurs, higher frequency signals can be used effectively.

Answer: Difficulty: Reference: L.O.:

a Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

20. A digital service offered by cable companies is the _________. a. b. c. d. e.

Abilene network WAP proxy G.Lite ADSL cable modem Next Generation Internet

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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21. Another term for cable networks that use both fiber-optic and coaxial cable is __________. a. b. c. d. e.

fixed wireless mobile wireless distribution hub hybrid fiber coax fibrax

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

22. A T1 level of ADSL has a maximum downstream rate of about _________ Mbps. a. b. c. d. e.

9000 8.4 1.5 650 6.1

Answer: Difficulty: Reference: L.O.:

c Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

23. A cable company headend is also referred to as a: a. b. c. d. e.

Abilene network WAP proxy cable modem distribution hub fiber node

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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24. In a DSL environment, local loops from many customers enter and are connected to the _____. a. b. c. d. e.

central office computer center main central office main distribution facility rack

Answer: Difficulty: Reference: L.O.:

d Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

25. A(n) __________ is used to connect a fiber optic cable from the cable TV company side to a coaxial cable on the customer side. a. b. c. d. e.

CA*net 3 RFC WAP proxy fixed wireless connection optical-electrical converter

Answer: Difficulty: Reference: L.O.:

e Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

26. A(n) ___________ contains a series of cable modems/multiplexers and converts the data from cable modem protocols into protocols needed for Internet traffic, before passing them to a router connected to an ISP POP. a. b. c. d. e.

Internet steering system optical-electrical converter WAP proxy cable modem termination system fixed wireless system

Answer: Difficulty: Reference: L.O.:

d Easy Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

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27. In a cable modem environment, a _______ is used to combine Internet data traffic with ordinary TV video traffic and then send it back to the fiber node for distribution. a. b. c. d. e.

modem router bridge combiner CMTS

Answer: Difficulty: Reference: L.O.:

d Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

28. Fiber to the Home uses _____. a. b. c. d. e.

frequency division multiplexing wavelength division multiplexing time division multiplexing statistical time division multiplexing all of the above

Answer: Difficulty: Reference: L.O.:

b Medium Internet Access Technologies Be familiar with DSL, cable modem, and fiber to the home

29. The closest the Internet has to an “owning” organization is the ___________. a. b. c. d. e.

Internet Service Provider Abilene network CA*Net3 University Corporation for Advanced Internet Development Internet Society

Answer: Difficulty: Reference: L.O.:

e Easy The Future of the Internet Understand the overall design of the Internet

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30. Which of the following is not part of the work of the Internet Society? a. b. c. d. e.

public policy connecting optical-electrical converters education development of Internet standards maintenance of Internet standards

Answer: Difficulty: Reference: L.O.:

b Medium The Future of the Internet Understand the overall design of the Internet

31. The ________ is a large open international community of network designers, operators, vendors, and researchers concerned with the evolution of the Internet architecture and smooth operation of the Internet. a. b. c. d. e.

Internet Society Internet Engineering Task Force Internet Engineering Steering Committee Internet Architecture Board Internet Research Task Force

Answer: Difficulty: Reference: L.O.:

b Medium The Future of the Internet Understand the overall design of the Internet

32. The ___________ is responsible for technical management of IETF and the Internet standards process. a. b. c. d. e.

Internet Society University Corporation for Advanced Internet Development Internet Engineering Steering Committee Internet Architecture Board Internet Research Task Force

Answer: Difficulty: Reference: L.O.:

c Medium The Future of the Internet Understand the overall design of the Internet

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33. The _________operates like the IETF through small research groups focused on specific issues. a. b. c. d. e.

Internet Society University Corporation for Advanced Internet Development Internet Engineering Steering Committee Internet Architecture Board Internet Research Task Force

Answer: Difficulty: Reference: L.O.:

e Easy The Future of the Internet Understand the overall design of the Internet

34. In 1996, The National Science foundation provided $100 million to start the ___________ program to develop the very-high-performance Backbone Network Service. a. b. c. d. e.

CA*Net3 UCAID Next Generation Internet Internet 3 WAP proxy

Answer: Difficulty: Reference: L.O.:

c Medium The Future of the Internet Understand the overall design of the Internet

35. Which of the following new Internet efforts was started by 34 universities? a. b. c. d. e.

CA*net 3 ARDNOC vBNS NGI Internet2

Answer: Difficulty: Reference: L.O.:

e Easy The Future of the Internet Be familiar with possible future directions of the Internet

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36. A high-speed Internet has a set of access points called ____pops that provide pointof-presence at ________ speeds. a. b. c. d. e.

giga, gigabit mega, megabit multi, multibit giga, megabit multi, gigabit

Answer: Difficulty: Reference: L.O.:

a Easy The Future of the Internet Be familiar with possible future directions of the Internet

37. Some of the new applications being developed for a high-speed Internet include a. b. c. d. e.

Tele-immersion Tele-conferencing QoS Broadband Tele-phoning

Answer: Difficulty: Reference: L.O.:

a Easy The Future of the Internet Be familiar with possible future directions of the Internet

38. Internet2® is an organization of about _____ universities, corporations, government agencies, and organizations. a. b. c. d.

100 250 400 750

Answer: Difficulty: Reference: L.O.:

c Easy The Future of the Internet Be familiar with possible future directions of the Internet

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Chapter 11 Network Security True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. Security on a network not only means being able to prevent a hacker from breaking into your computer but also includes being able to recover from temporary service problems or from natural disasters.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

2. The rise of the Internet has increased significantly the potential vulnerability of an organization’s assets.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

3. The CERT was established at MIT. Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with the major threats to network security

4. Confidentiality refers to the protection of the organizational data from unauthorized disclosure of customer and proprietary data.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Be familiar with the major threats to network security

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5. Maintaining data integrity is not a primary goal of security.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with the major threats to network security

6. Business continuity planning refers primarily to ensuring availability, with some aspects of data integrity.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

7. Intrusion primarily refers to the loss of confidentiality of organizational data.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

8. Controls are mechanisms that reduce or eliminate threats to network security.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

9. Corrective controls reveal or discover unwanted events.

Answer: Difficulty: Reference: L.O.:

False Easy Introduction Be familiar with the major threats to network security

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10. Preventive controls mitigate or stop a person from acting or an event from occurring.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Be familiar with the major threats to network security

11. A threat to the data communications network is any potential adverse occurrence that can do harm, interrupt the systems using the network, or cause a monetary loss to the organization.

Answer: Difficulty: Reference: L.O.:

True Easy Risk Assessment Be familiar with how to conduct a risk assessment

12. Companies have learned that threats from hacking from its own employees occur about as often as by outsiders.

Answer: Difficulty: Reference: L.O.:

True Easy Risk Assessment Be familiar with how to conduct a risk assessment

13. When someone external to your organization blocks access to your network and/or its resources, this is known as a denial-of-service attack.

Answer: Difficulty: Reference: L.O.:

True Medium Risk Assessment Be familiar with how to conduct a risk assessment

14. An uninterruptible power supply utilizes a second redundant disk for every disk on the server.

Answer: Difficulty: Reference: L.O.:

False Easy Risk Assessment Be familiar with how to conduct a risk assessment

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15. Disk mirroring writes duplicate copies of all data on at least two different disks.

Answer: Difficulty: Reference: L.O.:

True Medium Risk Assessment Be familiar with how to conduct a risk assessment

16. The ideal solution for planning for disaster recovery is to have a fully redundant backup network placed in a different location that would not be threatened by the same natural or manmade disaster that would destroy the original network.

Answer: Difficulty: Reference: L.O.:

True Easy Risk Assessment Be familiar with how to conduct a risk assessment

17. Macro viruses can spread when an infected file is opened.

Answer: Difficulty: Reference: L.O.:

True Easy Ensuring Business Continuity Understand how to ensure business continuity

18. Researchers estimate that only one or two new viruses are developed every week.

Answer: Difficulty: Reference: L.O.:

False Easy Ensuring Business Continuity Understand how to ensure business continuity

19. The denial-of-service attack disrupts the network by flooding the network with messages so that regular messages cannot be processed.

Answer: Difficulty: Reference: L.O.:

True Easy Ensuring Business Continuity Understand how to ensure business continuity

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20. DoS attackers generally use fake source IP addresses, making it harder to identify the DoS messages.

Answer: Difficulty: Reference: L.O.:

True Medium Ensuring Business Continuity Understand how to ensure business continuity

21. Fault-intolerant servers contain many redundant components to prevent failure.

Answer: Difficulty: Reference: L.O.:

False Easy Ensuring Business Continuity Understand how to ensure business continuity

22. Crackers are casual hackers with a limited knowledge of computer security.

Answer: Difficulty: Reference: L.O.:

False Medium Intrusion Prevention Understand how to prevent intrusion

23. The most common access point used by attackers to gain access to an organization’s network is the Internet connection.

Answer: Difficulty: Reference: L.O.:

True Medium Intrusion Prevention Understand how to prevent intrusion

24. Physical security of an organization’s IT resources is not an important element in preventing intrusion to an internal LAN. Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

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25. Network cables are the easiest target for eavesdropping.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

26. Triple DES uses a total of 512 bits as the key.

Answer: Difficulty: Reference: L.O.:

False Medium Intrusion Prevention Understand how to prevent intrusion

27. An intruder uses TCP spoofing to send packets to a target computer requesting certain privileges be granted to some user.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

28. A packet-level firewall examines the source and destination address of every network packet that passes though the firewall.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

29. With application level firewalls, any access that has not been explicitly denied is automatically permitted.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

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30. A NAT firewall uses an address table to translate private IP addresses used inside the organization into proxy IP addresses used on the Internet.

Answer: Difficulty: Reference: L.O.:

True Medium Intrusion Prevention Understand how to prevent intrusion

31. A security hole is a bug or vulnerability that permits intrusion to a computer.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

32. A software solution to correct a security hole is often referred to as a patch or update.

Answer: Difficulty: Reference: L.O.:

True Medium Intrusion Prevention Understand how to prevent intrusion

33. Microsoft’s Windows operating system meets the US government’s A1 level security.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

34. A Trojan horse may allow an unauthorized user to access a computer from a remote location.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

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35. Decryption is the process of converting plaintext into ciphertext.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

36. Asymmetric encryption uses the same key to encrypt and decrypt a message.

Answer: Difficulty: Reference: L.O.:

False Medium Intrusion Prevention Understand how to prevent intrusion

37. A brute-force attack is a method of trying to guess the correct password by trying every possible key.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

38. DES is a commonly used symmetric encryption algorithm, developed in the mid1990s by the American government in conjunction with IBM, and is the recommended encryption algorithm for highly sensitive data.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

39. When using a digital signature for the process of authentication, the sender encrypts the message with their private key and the recipient decrypts the message with the sender’s public key.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

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40. A certificate authority is a trusted organization that can vouch for the authenticity of a person or organization.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

41. Secure Sockets Layer is an encryption standard designed for use on the Web. Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

42. In transport mode, IPSec encrypts the entire IP packet.

Answer: Difficulty: Reference: L.O.:

False Medium Intrusion Prevention Understand how to prevent intrusion

43. Biometric systems scan the user to ensure that the user is the sole individual authorized to access the network account.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

44. Social engineering refers to creating a team that solves virus problems.

Answer: Difficulty: Reference: L.O.:

False Easy Intrusion Prevention Understand how to prevent intrusion

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45. The most commonly used central authentication protocol used today is Kerberos.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

46. A host based intrusion prevention system (IPS) monitors activity on the server and reports intrusions to the IPS management console.

Answer: Difficulty: Reference: L.O.:

True Easy Intrusion Prevention Understand how to prevent intrusion

47. An asset can be compromised by more than one threat, so it is common to have more than one threat scenario for each asset.

Answer: Difficulty: Reference: L.O.:

True Easy Risk Assessment Be familiar with how to conduct a risk assessment

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. Which of the following is not one of the major categories (or sub-categories) into which network security threats can be placed? a. b. c. d. e.

disruption destruction controlled chaos intrusion disaster

Answer: Difficulty: Reference: L.O.:

c Easy Introduction Be familiar with the major threats to network security

2. In recent years, management’s concern about the adequacy of current control and security mechanisms used in a data communications environment has: a. decreased because the new sophisticated technology is far more secure than the old manual methods. b. remained the same because management was always deeply interest in control and security. c. decreased because of the change in moral and ethical codes in the U.S. to a kinder and gentler society. d. increased because this commitment to data communications has changed the potential vulnerability of the organization’s assets. e. remained the same because there are very few threats to data communications.

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the major threats to network security

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3. An example of _____ data would be if a computer virus eliminated files on that computer. a. b. c. d. e.

disruption controlled chaos intrusion destruction disaster

Answer: Difficulty: Reference: L.O.:

d Medium Introduction Be familiar with the major threats to network security

4. A tornado that eliminates a network control center would be an example of a natural __________. a. b. c. d. e.

disaster disruption controlled chaos destruction intrusion

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with the major threats to network security

5. Often, incidents of unauthorized access known as___________, involve employees of the organization, surprisingly enough. a. b. c. d. e.

intrusion disruption controlled chaos destruction disaster

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with the major threats to network security

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6. A network switch failure is an example of a(n) ________ threat. a. b. c. d. e.

internal disruptive causal intrusion disaster

Answer: Difficulty: Reference: L.O.:

b Medium Introduction Be familiar with the major threats to network security

7. A hacker gaining access to organizational data files and resources is an example of a(n) ____________ threat. a. b. c. d. e.

disruptive controlled chaos disruptive intrusion disaster

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the major threats to network security

8. _________ controls stop a person from acting. a. b. c. d. e.

Detective Corrective Mitigating Preventive Backup

Answer: Difficulty: Reference: L.O.:

d Easy Introduction Be familiar with the major threats to network security

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9. ________ controls discover unwanted events. a. b. c. d. e.

Preventive Corrective Detective Mitigating Backup

Answer: Difficulty: Reference: L.O.:

c Easy Introduction Be familiar with the major threats to network security

10. ________ controls fix a trespass into the network. a. b. c. d. e.

Corrective Detective Preventive Mitigating Backup

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Be familiar with the major threats to network security

11. A ___________ assigns levels of risk to various threats to network security by comparing the nature of the threats to the controls designed to reduce them. a. b. c. d. e.

risk assessment backplane mitigating control factor analysis control verification worksheet control test plan

Answer: Difficulty: Reference: L.O.:

a Medium Risk Assessment Be familiar with how to conduct a risk assessment

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12. A(n) _________ is something of value and can be either hardware or software. a. b. c. d. e.

asset service level agreement threat security plan network design

Answer: Difficulty: Reference: L.O.:

a Easy Risk Assessment Be familiar with how to conduct a risk assessment

13. A(n) ____________, is an information system that is critical to the survival of an organization. a. b. c. d. e.

network plan accounting system IDS mission critical application firewall

Answer: Difficulty: Reference: L.O.:

d Medium Risk Assessment Be familiar with how to conduct a risk assessment

14. A(n) __________ is any potential adverse occurrence that can do harm, interrupt the system using the network to cause monetary loss to the organization. a. b. c. d. e.

asset service level agreement threat security plan network design

Answer: Difficulty: Reference: L.O.:

c Medium Risk Assessment Be familiar with how to conduct a risk assessment

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15. The key principle in preventing disruption, destruction and disaster is ___________. a. b. c. d. e.

redundancy control spreadsheet IDS anti-virus software prevention controls

Answer: Difficulty: Reference: L.O.:

a Medium Risk Assessment Be familiar with how to conduct a risk assessment

16. A(n) ___________ is one of the most common examples of redundancy built into a network to help reduce the impact of disruption. a. b. c. d. e.

network cloaking device backup punch card reader uninterruptible power supply service level agreement help desk

Answer: Difficulty: Reference: L.O.:

c Medium Risk Assessment Be familiar with how to conduct a risk assessment

17. A (n) ______ is a special type of virus that spreads itself without human intervention. a. b. c. d. e.

snake worm Trojan horse boot sector virus stealth virus

Answer: Difficulty: Reference: L.O.:

b Medium Ensuring Business Continuity Understand how to ensure business continuity

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18. A ____________ is a situation in which a hacker attempts to disrupt the network by sending messages to the network that prevent normal users’ messages from being processed. a. b. c. d. e.

denial-of-service attack service level agreement virus spamming scamming

Answer: Difficulty: Reference: L.O.:

a Medium Ensuring Business Continuity Understand how to ensure business continuity

19. Which of the following is not a type of intruder who attempts to gain intrusion to computer networks? a. b. c. d. e.

Delphi team member script kiddies crackers professional hackers organization employees

Answer: Difficulty: Reference: L.O.:

a Easy Intrusion Prevention Understand how to prevent intrusion

20. Which of the following is not a method for deterring intrusion? a. training end users not to divulge passwords b. using a smart card in conjunction with a password to gain access to a computer system c. using biometric devices to gain access to a computer system d. using a security software package that logs out users if that user is ‘idle’ for a certain amount of time e. performing social engineering Answer: Difficulty: Reference: L.O.:

e Medium Intrusion Prevention Understand how to prevent intrusion

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21. The three basic network access points into most organizational networks are from the Internet, from LANs inside of the organization and ________________. a. b. c. d. e.

WLANs intranet extranet WAN none of the above

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

22. Which of the following type of media is least susceptible to eavesdropping? a. b. c. d. e.

fiber optics twisted pair microwave infrared coaxial cable

Answer: Difficulty: Reference: L.O.:

a Easy Intrusion Prevention Understand how to prevent intrusion

23. Which of the following are usually the first choice for eavesdropping? a. b. c. d. e.

unshielded twisted pair shielded twisted pair local cables owned by the organization wireless LANs fiber optics

Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

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24. For Ethernet networks, a _______ switch can make eavesdropping more difficult. a. b. c. d. e.

secure Trojan horse proxy spoofing spamming

Answer: Difficulty: Reference: L.O.:

a Easy Intrusion Prevention Understand how to prevent intrusion

25. Which of the following is not a method for deterring outside intruders from gaining access to the organization’s office or network equipment facilities? a. b. c. d. e.

locked doors on all communication closets passwords that disable the screen and keyboard of a computer secured network cabling behind walls and above ceilings use of armored cable unlocked wiring closet for network devices

Answer: Difficulty: Reference: L.O.:

e Easy Intrusion Prevention Understand how to prevent intrusion

26. A sniffer program is a _____. a. type of macro-virus b. small peep-hole in a door or wall to allow a security guard to sniff the area with his or her nose before entering a secure area or location c. used in a call-back modem d. a program that records all LAN messages received for later analysis e. secure hub program Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

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27. _______________ is an encryption standard that uses a total of 168 bits as the key. a. b. c. d. e.

Triple DES Dial-back WEP EAP Ciphering

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

28. __________ refers to the process of translating between one set of private IP addresses inside a network and a set of public addresses outside the network. a. b. c. d. e.

Translation Conversion Network Address Translation Proxy translation IP conversion.

Answer: Difficulty: Reference: L.O.:

c Medium Intrusion Prevention Understand how to prevent intrusion

29. A __________ is a router or special purpose computer that examines packets flowing into and out of a network and restricts access to the organization’s network. a. b. c. d. e.

firewall token system ANI call-back modem firefighter

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

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30. A(n) ____________ examines the source and destination address of every network packet that passes through it. a. b. c. d. e.

packet level firewall mullion server ANI system IP spoofing system network switch

Answer: Difficulty: Reference: L.O.:

a Easy Intrusion Prevention Understand how to prevent intrusion

31. IP spoofing means to: a. fool the target computer and any intervening firewall into believing that messages from the intruder’s computer are actually coming from an authorized user inside the organization’s network b. clad or cover the internal processing (IP) lines with insulating material to shield the IP lines from excess heat or radiation c. illegally tape or listen in on telephone conversations d. detect and prevent denial-of-service attacks e. act as an intermediate host computer between the Internet and the rest of the organization’s networks Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

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32. A(n) ____________ can use stateful inspection to monitor and record the status of each connection and can use this information in making decisions about what packets to discard as security threats. a. b. c. d. e.

application level firewall bullion server ANI system IP spoofing systems packet level firewall

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

33. A(n) _______ is a screened subnet devoted solely to public access servers such as Web servers and public DNS servers. a. b. c. d. e.

intranet DMZ zone of authority VLAN smart hub

Answer: Difficulty: Reference: L.O.:

b Easy Intrusion Prevention Understand how to prevent intrusion

34. A security hole is a(n) _____. a. malfunction or bug in an application program that allows data to be seen or accessed by unauthorized users b. small peep-hole in a door or wall to allow a security guard to examine an individual before allowing that individual access to a secure area or location c. packet-level firewall d. missing or absent protected mode addressing restrictions on user programs during multitasking or multithreaded program execution e. ANI system Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

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35. Spyware, adware and DDOS agents are three types of _____. a. b. c. d. e.

IP spoofing attacks Denial-of-service attacks Trojans Physical security threats Intrusion prevention detection approaches

Answer: Difficulty: Reference: L.O.:

c Medium Intrusion Prevention Understand how to prevent intrusion

36. A way to prevent intrusion by disguising information through algorithms is _____. a. b. c. d. e.

spoofing call-back access encryption disk elevatoring disk mirroring

Answer: Difficulty: Reference: L.O.:

c Medium Intrusion Prevention Understand how to prevent intrusion

37. Encryption is the process of _____. a. transmission of information over secure lines in analog form to prevent illegal access b. detecting errors in messages by means of mathematical rules c. correcting errors in message by means of mathematical rules d. disguising information by the use of mathematical rules, known as algorithms e. preventing errors in messages by means of logical rules Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

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38. Symmetric encryption systems have two parts: the key and the ____________. a. b. c. d. e.

algorithm spamming method IP spoofer clearance code smart card bits

Answer: Difficulty: Reference: L.O.:

a Easy Intrusion Prevention Understand how to prevent intrusion

39. A brute force attack against an encryption system _____. a. b. c. d. e.

is called RC4 tries to gain access by trying every possible key is also known as 3DES always uses the Rijndael algorithm is part of the Advanced Encyrption Standard

Answer: Difficulty: Reference: L.O.:

b Easy Intrusion Prevention Understand how to prevent intrusion

40. DES _____. a. is maintained by ISO b. refers to Date Electronic Security c. is a commonly used symmetric encryption algorithm that was developed in the mid-1970s d. was developed by a joint effort that included Microsoft e. is an asymmetric algorithm Answer: Difficulty: Reference: L.O.:

c Medium Intrusion Prevention Understand how to prevent intrusion

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41. __________ provide authentication which can legally prove who sent a message over a network. a. b. c. d. e.

Digital signatures DES keys Directory keys Screen names User Ids

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

42. A __________ is a trusted organization that can vouch for the authenticity of the person or the organization using the authentication. a. b. c. d. e.

disaster recovery firm DES company directory company certificate authority fingerprint advisory board

Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

43. IP Security Protocol _____. a. b. c. d. e.

is focused on Web applications is primarily used to encrypt e-mail is a policy which makes public key encryption work on the Internet sits between IP at the network layer and TCP/UDP at the transport layer operates in entrapment mode

Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

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44. Which of the following is a mode that is used by IPSec? a. b. c. d. e.

exchange sniffer tunnel creeper firefighter

Answer: Difficulty: Reference: L.O.:

c Medium Intrusion Prevention Understand how to prevent intrusion

45. Which of the following is not true about one-time passwords? a. Users’ pagers or smart phones (via text messaging) can receive them. b. They can be used in conjunction with a token system. c. The user must enter the one-time password to gain access or the connection is terminated. d. This is a good security solution for users who travel frequently and who must have secure dial-in access. e. They create a packet level firewall on the system.

Answer: Difficulty: Reference: L.O.:

e Medium Intrusion Prevention Understand how to prevent intrusion

46. Which of the following is a type of intrusion prevention system? a. b. c. d. e.

zoned-based data link-based host-based transport-based none of the above is an appropriate answer

Answer: Difficulty: Reference: L.O.:

c Easy Intrusion Prevention Understand how to prevent intrusion

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47. A fundamental technique to determine if an intrusion is in progress in a stable network is: a. b. c. d. e.

anomaly detection armoring cable RSA algorithm patching scanning a user’s fingerprint

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

48. To snare intruders, many organizations now use _________ techniques. a. b. c. d. e.

entrapment hacker Trojan horse cracker DES

Answer: Difficulty: Reference: L.O.:

a Medium Intrusion Prevention Understand how to prevent intrusion

49. The use of computer analysis techniques to gather evidence for criminal and/or civil trials is known as _____. a. b. c. d. e.

Trojan horse sniffing tunneling computer forensics misuse detection

Answer: Difficulty: Reference: L.O.:

d Medium Intrusion Prevention Understand how to prevent intrusion

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50. According to Symantec, more than 50% of all targeted companies had fewer than 2,500 employees because they a. b. c. d. e.

often have weaker security. have more assets. are more likely to have credit card numbers available. are likely off-shore. have lower bandwidth

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Be familiar with the major threats to network security

51. The use of hacking techniques to bring attention to a larger political or social goal is referred to as _____. a. b. c. d. e.

cracking ethical politics hacktivism social engineering brute force attacks

Answer: Difficulty: Reference: L.O.:

c Medium Introduction Be familiar with the major threats to network security

52. Which of the following is not considered one of the five most common business impacts? a. b. c. d. e.

Financial Productivity Reputation Social Safety

Answer: Difficulty: Reference: L.O.:

d Medium Risk Assessment Be familiar with how to conduct a risk assessment

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53. _______________ describes how an asset can be compromised by one specific threat. a. b. c. d. e.

Threat scenarios Threat plans Threat hacks Threat contingencies Threat attacks

Answer: Difficulty: Reference: L.O.:

a Medium Risk Assessment Be familiar with how to conduct a risk assessment

54. We can calculate the relative ___________, by multiplying the impact score by the likelihood. a. b. c. d. e.

rootkit authentication risk score risk assessment risk event

Answer: Difficulty: Reference: L.O.:

c Medium Risk Assessment Be familiar with how to conduct a risk assessment

55. A ______________ is a browser add-in or app that stores website passwords. a. b. c. d. e.

password collaborator password manager script manager security envelope security manager

Answer: Difficulty: Reference: L.O.:

B Medium User Authentication Understand how to prevent intrusion

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56. _______ is the most commonly used central authentication protocol. a. b. c. d. e.

DES Kerberos OSI SK1 TGT

Answer: Difficulty: Reference: L.O.:

b Medium User Authentication Understand how to prevent intrusion

57. RAID1 writes duplicate copies of all data on at least two different disks; this means that if one disk in the RAID array fails, there is no data loss because there is a second copy of the data stored on a different disk. This is referred to as _____. a. b. c. d. e.

disk backup hard drive duplication cloud backups disk duplication disk mirroring

Answer: Difficulty: Reference: L.O.:

e Medium Ensuring Business Continuity Understand how to ensure business continuity

58. A ______ uses an address table to translate the private IP addresses used inside the organization into proxy IP addresses used on the Internet. a. b. c. d. e.

NAT proxy server virtual server DNS server privacy server anomaly server

Answer: Difficulty: Reference: L.O.:

A Medium Intrusion Prevention Understand how to prevent intrusion

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Chapter 12 Network Management True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished.

1. The term “firefighting” is used to describe a situation where network managers spend all of their time dealing with breakdowns and immediate problems and do not have time to plan and organize properly.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand what is required to manage the day-to-day operation of networks

2. Network management is the process of operating, monitoring, and controlling the network to ensure it works as intended and provides value to its users.

Answer: Difficulty: Reference: L.O.:

True Easy Introduction Understand what is required to manage the day-to-day operation of networks

3. If managers do not pay enough attention to planning and organizing the network, they are going to end up being proactive vs. reactive in solving network problems.

Answer: Difficulty: Reference: L.O.:

False Medium Introduction Understand what is required to manage the day-to-day operation of networks

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4. Due to changing communication technologies, most companies have combined voice and data communications functions.

Answer: Difficulty: Reference: L.O.:

True Medium Introduction Understand what is required to manage the day-to-day operation of networks

5. One of the least common configuration activities for a network manager is adding and deleting user accounts.

Answer: Difficulty: Reference: L.O.:

False Medium Configuration Management Understand configuration management

6. One common configuration activity is updating the software on the client computers in the network.

Answer: Difficulty: Reference: L.O.:

True Easy Configuration Management Understand configuration management

7. Desktop management software requires managers to install software such as antivirus updates or application updates on client computers manually.

Answer: Difficulty: Reference: L.O.:

False Easy Configuration Management Understand configuration management

8. In many organizations, configuration documentation takes the form of a large set of network diagrams, one for each LAN, BN, and WAN. Answer: Difficulty: Reference: L.O.:

True Easy Configuration Management Understand configuration management

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9. To help in negotiating site licenses for software, it is important to document which software packages are installed on each client.

Answer: Difficulty: Reference: L.O.:

True Easy Configuration Management Understand configuration management

10. User profiles should enable the network manager to identify the access rights (to particular files and directories) for each user.

Answer: Difficulty: Reference: L.O.:

True Easy Configuration Management Understand configuration management

11. Performance management means ensuring the network is operating as efficiently as possible.

Answer: Difficulty: Reference: L.O.:

True Easy Performance and Fault Management Understand performance and fault management

12. Network management software is used by most large organization to monitor and control their networks.

Answer: Difficulty: Reference: L.O.:

True Easy Performance and Fault Management Understand performance and fault management

13. Failure control requires developing a decentralized control philosophy for problem reporting.

Answer: Difficulty: Reference: L.O.:

False Medium Performance and Fault Management Understand performance and fault management

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14. Trouble tickets are reports produced by a software package that records fault information.

Answer: Difficulty: Reference: L.O.:

True Medium Performance and Fault Management Understand performance and fault management

15. Problem statistics are not helpful in determining whether vendors are meeting contractual maintenance commitments.

Answer: Difficulty: Reference: L.O.:

False Medium Performance and Fault Management Understand performance and fault management

16. To ensure that critical problems get priority over less important ones, problem prioritizing is needed in a network.

Answer: Difficulty: Reference: L.O.:

True Medium Performance and Fault Management Understand performance and fault management

17. Management reports can be helpful in determining network availability statistics.

Answer: Difficulty: Reference: L.O.:

True Medium Performance and Fault Management Understand performance and fault management

18. Mean Time between Failures is a statistic that is used to track device reliability.

Answer: Difficulty: Reference: L.O.:

True Medium Performance and Fault Management Understand performance and fault management

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19. Quality control charts are a simple tool that can be used by network managers to monitor network conditions.

Answer: Difficulty: Reference: L.O.:

True Easy Performance and Fault Management Understand performance and fault management

20. Service level agreements specify the exact type of performance and fault conditions that an organization will accept from a common carrier or Internet service provider.

Answer: Difficulty: Reference: L.O.:

True Medium Performance and Fault Management Understand performance and fault management

21. Ideally, when users receive training about fundamentals of network use, they become confident about what they need to do when working on a network.

Answer: Difficulty: Reference: L.O.:

True Easy End User Support Be familiar with end user support

22. Network management software is designed primarily to provide automated support for at least some of the network management functions.

Answer: Difficulty: Reference: L.O.:

True Easy Cost Management Be familiar with cost management

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MULTIPLE CHOICE The following are possible multiple-choice questions for tests. The question is posed and the answer is provided under the choices. The level of difficulty (easy, medium, and hard) and the page number(s) relevant to the topic is also furnished.

1. ___________ is when network managers deal with network breakdowns and immediate problems, instead of performing tasks according to a well laid out plan. a. b. c. d. e.

Panicking Multiplexing Multitasking Firefighting Fireflying

Answer: Difficulty: Reference: L.O.:

d Medium Introduction Understand what is required to manage the day-to-day operation of networks

2. Which of the following is not a basic function of a network manager? a. b. c. d. e.

Web surfing to shop on eBay cost management performance and fault management configuration management end user support

Answer: Difficulty: Reference: L.O.:

a Easy Introduction Understand what is required to manage the day-to-day operation of networks

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3. To help reduce firefighting in network management, a network manager should spend time on ____________ to prevent problems. a. b. c. d. e.

planning and organizing the network and networking staff LAN manual fault log trouble ticket troubleshooting log

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Understand what is required to manage the day-to-day operation of networks

4. Which of the following is not considered a key management task for running a network? a. b. c. d. e.

knowledge of frame relay planning organizing activities directing activities controlling activities

Answer: Difficulty: Reference: L.O.:

a Medium Introduction Understand what is required to manage the day-to-day operation of networks

5. ___________ refers to managing and documenting the network’s hardware and software configuration. a. b. c. d. e.

Visioning Troubleshooting Firefighting Configuration management Implementation

Answer: Difficulty: Reference: L.O.:

d Medium Configuration Management Understand configuration management

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6. ____________ is also called automatic software distribution. a. b. c. d. e.

Electronic Data Interchange Software architecture Desktop management Automatic configuration management Email Software Uploading

Answer: Difficulty: Reference: L.O.:

c Easy Configuration Management Understand configuration management

7. Desktop management _____. a. increases the cost of configuration management over the long term b. requires managers to install software and application updates manually on client computers c. automatically produces documentation of software installed on each client computer d. cannot maintain documentation of software installed on each client computer e. decreases costs in the short term Answer: Difficulty: Reference: L.O.:

c Medium Configuration Management Understand configuration management

8. Which of the following is typically not a part of configuration documentation? a. b. c. d. e.

hardware documentation sales brochures for new hardware products being considered by the organization user profiles network software documentation software documentation

Answer: Difficulty: Reference: L.O.:

b Medium Configuration Management Understand configuration management

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9. Documentation for network and application software _____. a. b. c. d. e.

usually does not include information about the network operating system usually does not include information about any special purpose network software includes information about which data files each user can access is not generally needed since networks are comprised of hardware only is important for monitoring adherence to software license rules

Answer: Difficulty: Reference: L.O.:

e Medium Configuration Management Understand configuration management

10. ___________ ensures that the network is operating as efficiently as possible. a. b. c. d. e.

Firefighting Fault tolerance Fault management Performance management Troubleshooting

Answer: Difficulty: Reference: L.O.:

d Easy Performance and Fault Management Understand performance and fault management

11. __________ refers to preventing, detecting, and correcting faults in the network circuits, hardware, and software. a. b. c. d. e.

Fault management Fault tolerance Firefighting Performance management Troubleshooting

Answer: Difficulty: Reference: L.O.:

a Easy Performance and Fault Management Understand performance and fault management

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12. ____________ refers to keeping track of the operation of network circuits to make sure they are working properly. a. b. c. d. e.

Network monitoring Fault tolerance Fault management Firefighting Downtime

Answer: Difficulty: Reference: L.O.:

a Easy Performance and Fault Management Understand performance and fault management

13. _____________ are used by many large and small organizations to monitor and control their networks today. a. b. c. d. e.

Network management software packages Firefighter packages Fault creating packages Fault toleraters NICs

Answer: Difficulty: Reference: L.O.:

a Easy Performance and Fault Management Understand performance and fault management

14. A __________ is an organizational department that is responsible for monitoring and fixing overall network problems. a. b. c. d. e.

mission critical area fault tolerance department network operations center mullion delimiter agency Web surfing guru headquarters

Answer: Difficulty: Reference: L.O.:

c Easy Performance and Fault Management Understand performance and fault management

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15. Which of the following would not be included as part of the physical network parameter statistics monitored by a NMS? a. b. c. d. e.

stats on multiplexers stats on modems stats on circuits in the network stats on user response times stats on malfunctioning devices

Answer: Difficulty: Reference: L.O.:

d Medium Performance and Fault Management Understand performance and fault management

16. Network devices that are ________ do only what they are designed to do, such as routing packets, but do not provide any network management information. a. b. c. d. e.

voice-activated bursty faulty dumb intelligent

Answer: Difficulty: Reference: L.O.:

d Easy Performance and Fault Management Understand performance and fault management

17. _______ are network devices that record data on the messages they process as well as performing their “normal” message processing functions. a. b. c. d. e.

Faulty Bursty Trouble tickets Voice-activated Managed devices

Answer: Difficulty: Reference: L.O.:

e Medium Performance and Fault Management Understand performance and fault management

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18. ____________ are reports produced by numerous network software packages for recording fault information. a. b. c. d. e.

Wish list documentation Trouble tickets Smart hub lists Bursty router printouts Roger systems checks

Answer: Difficulty: Reference: L.O.:

b Easy Performance and Fault Management Understand performance and fault management

19. ___________ allows the network manager to determine who is responsible for correcting any outstanding problems. a. b. c. d. e.

Load balancing MTBF Availability Reliability Problem tracking

Answer: Difficulty: Reference: L.O.:

e Easy Performance and Fault Management Understand performance and fault management

20. _____________ helps ensure that critical problems get priority over less important ones. a. b. c. d. e.

Protocol analyzing Problem prioritizing Uptime Availability Reliability

Answer: Difficulty: Reference: L.O.:

b Easy Performance and Fault Management Understand performance and fault management

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21. _______ is an indicator of the efficiency of problem management personnel in correctly finding the root cause of the failure. a. b. c. d. e.

MTBF Availability MTTRespond MTTDiagnose MTTRate

Answer: Difficulty: Reference: L.O.:

d Easy Performance and Fault Management Understand performance and fault management

22. _____ is a criterion that keeps track of the number of hours or days of continuous operation before a component fails. a. b. c. d. e.

MTTDiagnose MTTRespond MTTRepair MTTFix MTBF

Answer: Difficulty: Reference: L.O.:

e Easy Performance and Fault Management Understand performance and fault management

23. ______ is a statistic that measures how quickly the staff corrected a network problem after they arrived at the problem site. a. b. c. d. e.

MTTDiagnose MTTRespond MTBF MTTFix MTTRate

Answer: Difficulty: Reference: L.O.:

d Easy Performance and Fault Management Understand performance and fault management

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24. _____________ is the percentage of time the network is usable by users. a. b. c. d. e.

Retransmission rate Availability MTTDiagnose Downtime MTBF

Answer: Difficulty: Reference: L.O.:

b Easy Performance and Fault Management Understand performance and fault management

25. A(n) _____________ is a simple tool that can help identify computers/devices or communication circuits that have higher-than-average error or usage rates. a. b. c. d. e.

Quality control chart Quality of service Service leveling chart Desktop management Alarm cloud

Answer: Difficulty: Reference: L.O.:

a Easy Performance and Fault Management Understand performance and fault management

26. ___________ that are negotiated with providers, such as common carriers, specify the exact type of performance and fault conditions that an organization will accept. a. b. c. d. e.

Service level agreements Trouble tickets Smart hub lists Bursty router printouts Wish list documentation

Answer: Difficulty: Reference: L.O.:

a Easy Performance and Fault Management Understand performance and fault management

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27. Which of the following is not a main function within end user support? a. b. c. d. e.

resolving network faults training resolving user problems spin control none of these answers are appropriate

Answer: Difficulty: Reference: L.O.:

d Medium End User Support Be familiar with end user support

28. Which of the following is not one of the three major sources of a user’s equipment problem that can be solved by network support? a. b. c. d. e.

use of the CD-ROM as a cup holder failed hardware device lack of user knowledge incompatibility between user software and network hardware and software none of the above is an appropriate answer

Answer: Difficulty: Reference: L.O.:

a Easy End User Support Be familiar with end user support

29. When a user problem cannot be solved by the help desk at the first level of resolution, the problem is ___________ to the second level of problem resolution. a. b. c. d. e.

firefought spun escalated burst delimited

Answer: Difficulty: Reference: L.O.:

c Easy End User Support Be familiar with end user support

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30. ________ is a measure of how much it costs per year to keep one computer operating. a. b. c. d. e.

Web gardening Software installation cost Hardware upgrade cost Total cost of ownership Support staff cost

Answer: Difficulty: Reference: L.O.:

d Easy Cost Management Be familiar with cost management

31. __________ policies attempt to allocate costs associated with a WAN or a mainframe to specific users. a. b. c. d. e.

Charge-back Web spinning Internet access fees Support staff billing ESD

Answer: Difficulty: Reference: L.O.:

a Medium Cost Management Be familiar with cost management

32. Which of the following is not an important step in reducing network costs? a. b. c. d. e.

moving to fat client architectures automating as much of the network management process as possible developing standards for computers on the network reducing the time spent manually installing new software centralizing help desks

Answer: Difficulty: Reference: L.O.:

a Easy Cost Management Be familiar with cost management

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33. ___________ provides information about configuration management of client computers on a network. a. b. c. d. e.

Circuit management software Device management software System management software Application management software Desktop management software

Answer: Difficulty: Reference: L.O.:

e Medium Configuration Management Understand configuration management

34. Most organizations strive to resolve between _______ of requests at the first level of support in less than an hour. a. b. c. d. e.

10% and 15% 20% and 30% 50% and 55% 75% and 85% 95% and 99%

Answer: Difficulty: Reference: L.O.:

d Easy End User Support Be familiar with end user support

35. In-class training for end users should focus on _____. a. b. c. d. e.

security exclusively all network topics 20% of the network functions that the user will use 80% of the time proper data entry the half of the applications that this particular uses most of the time

Answer: Difficulty: Reference: L.O.:

c Easy End User Support Be familiar with end user support

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36. A costing method that examines only the direct costs of operating the computers, omitting softer indirect costs such as “wasted” time is referred to as _____. a. b. c. d. e.

total cost of ownership network cost of ownership transactions costs ownership privileges total direct costs

Answer: Difficulty: Reference: L.O.:

b Easy Cost Management Be familiar with cost management

37. _____ a special type of Internet service that works in the opposite direction. a. b. c. d. e.

Akamai FTP Caching Capacity management Monitoring

Answer: Difficulty: Reference: L.O.:

a Easy Reducing Network Traffic Be familiar with the network management organization

38. The basic idea behind _______ is to store other people’s Web data closer to your users. a. managing networks b. content caching c. cost management d. load balancing e. traffic shaping Answer: Difficulty: Reference: L.O.:

b Easy Reducing Network Traffic Be familiar with the network management organization

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39. In some cases, one failure generates several dozen-problem reports, which makes it difficult to pinpoint the true source of the problem quickly. This is referred to as a(n) a. b. c. d. e.

Monday service failure alarm storm catastrophic issue server farm

Answer: Difficulty: Reference: L.O.:

c Easy Designing for Network Performance Understand performance and fault management

40. A ______ is a group of computers that are connected together to perform the same task. a. b. c. d. e.

mixer cluster load balancer virtual server cloud server

Answer: Difficulty: Reference: L.O.:

b Easy Designing for Network Performance Understand performance and fault management

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