Network Infrastructure
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Course Introduction
Network Infrastructure explores the foundational components and technologies that enable modern computer networks to function efficiently and securely. This course covers topics such as network topologies, protocols, hardware devices (including routers, switches, and firewalls), wireless networking, cabling standards, and network design principles. Students will gain insight into the configuration, management, and troubleshooting of both local area networks (LANs) and wide area networks (WANs), as well as the integration of cloud and hybrid networking solutions. Emphasis is placed on best practices for maintaining network reliability, security, and scalability in enterprise environments.
Recommended Textbook
Business Data Communications Infrastructure Networking and Security 7th Edition by William Stallings
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Chapter 1: Introduction
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Q1) ___________ is a nongovernmental organization that promotes the development of standardization and related activities with a view to facilitating the international exchange of goods and services,and to developing cooperation in the spheres of intellectual,scientific,technological,and economic activity.
Answer: ISO (International Organization for Standardization)
Q2) A classic example of __________ is the telephone network.
Answer: circuit switching
Q3) The __________ is an international organization within the United Nations System in which governments and the private sector coordinate global telecom networks and services.
Answer: ITU (International Telecommunication Union)
Q4) Convergence can be thought of in terms of a three-layer model of enterprixe communications: applications,enterprise services,and _________.
Answer: infrastructure
Q5) The major cost component for communications is the resource needed to transmit data across distance.
A)True
B)False
Answer: True
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Chapter 2: Business Information
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Q1) A _________ is an on-premise telephone switch,owned or leased by an organization that interconnects the telephones at that location and provides outside access to the public telephone systems and other voice services.
Answer: private branch exchange (PBX)
Q2) Common examples of data include text and numerical information. A)True
B)False
Answer: True
Q3) _________ is a subjective measure of the user's perception of the overall value of the network application or service.
Answer: Quality of Experience (QoE)
Q4) PBX and Centrex systems provide similar functionality from the users point-of-view. A)True
B)False
Answer: True
Q5) _________ is a 16-bit code that is backward compatible with IRA / ASCII. Answer: Unicode
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Chapter 3: Distributed Data Processing
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Q1) Which of the following is a category of ASP business?
A)functional / specialist
B)vertical market
C)enterprise
D)all of the above
Answer: D
Q2) ________ refers to everything that enables an organization to create,manipulate,and manage very large data sets (measured in terabytes,petabytes,exabytes,etc.)and the facilities in which these are stored.
Answer: Big data
Q3) An _________ provides users of client devices with applications associated with the Internet but isolated within the organization.
Answer: intranet
Q4) Centralized data processing typically involves terminals connected to large computers in a central data processing facility.
A)True
B)False
Answer: True
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Chapter 4: Data Transmission
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Q1) The simplest sort of signal is a(n)_________ signal,in which the same signal pattern repeats over time.
Q2) In order to completely compensate for attenuation,the signal generated must be at least as high in strength than the noise of the channel.
A)True
B)False
Q3) Digital signaling usually means that the information being conveyed is binary.
A)True
B)False
Q4) __________ has been experienced by anyone who,while having a telephone conversation,has been able to hear another telephone conversation.
Q5) Attenuation is the reduction in signal strength as the signal propagates down the transmission path.
A)True
B)False
Q6) Typically,crosstalk does not have a debilitating effect on signal quality.
A)True
B)False
Q7) The _________ of a signal is the range of frequencies that it contains.
Page 6
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Chapter 5: Data Communication Fundamentals
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Q1) A _______ modem permits Internet access over cable television networks.
Q2) ________ data take on discrete values; examples are text,integers,and binary data.
Q3) _________ data take on continuous values on some interval; for example,voice and video are continuously varying patterns of intensity.
Q4) In order to compensate for synchronization problems,another type of encoding method called biphase can be employed; these methods place a clock pulse within the data stream.
A)True
B)False
Q5) Error detection requires that extra bits be introduced into the data stream.
A)True
B)False
Q6) Standards are important when devices must communicate together; the four characteristics governed by these standards are:
A)mechanical,electrical,functional,and procedural
B)electrical,physical,functional,and signaling
C)fundamental,mechanical,procedural,and protocol
D)protocol,fundamental,physical,and signaling
Page 7
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Chapter 6: Data Link Control and Multiplexing
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Q1) To prevent interference,the channels are separated by ________,which are unused portions of the spectrum.
Q2) Which of the following is NOT a common component of an error control process?
A)damaged frame
B)error detection
C)positive acknowledgement
D)retransmission after timeout
Q3) A disadvantage of sliding window flow control is that it is not supported by many data link control protocols.
A)True
B)False
Q4) With ________ the light steaming through the fiber consists of many colors,or wavelengths,each carrying a separate channel of data.
A)LCF
B)WDM
C)TDM
D)FWD
Q5) ________ is used in fiber-to-the-home (FTTH)systems.
Q6) One of the most popular forms of synchronous TDM is known as ________.
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Chapter 7: The Internet
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Q1) A paradigm for electronic communications where a dedicated path is opened and maintained during the exchange is called _________.
A)message switching
B)circuit switching
C)packet switching
D)data switching
Q2) When using message switching instead of packet switching,a dedicated path must be established between the parties for all messages that are sent.
A)True
B)False
Q3) When using circuit switching,a dedicated path of transmission facilities is established between the communicating parties.
A)True
B)False
Q4) The National Science Foundation was responsible for many of the policy decisions that led to the modern Internet.
A)True
B)False
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Chapter 8: Tcp / Ip
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Q1) ________ is an Internet-based standard and is the framework for developing a complete range of computer communications standards.
Q2) LANs and WANs are usually isolated entities.
A)True
B)False
Q3) The ________ layer is concerned with the exchange of data between a computer and the network to which it is attached.
A)transport
B)application
C)network access
D)physical
Q4) Wireless networking brings:
A)increased security risks
B)management headaches
C)increased demands on support staff
D)all of the above
Q5) A router is a more complex intermediate system than a bridge.
A)True
B)False
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Chapter 9: Client Server, intranet, and Cloud Computing
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Q1) In a ________ processing configuration,the application processing is performed in an optimized fashion,taking advantage of the strengths of both client and server machines and of the distribution of data.
A)host-based B)server-based C)client-based D)cooperative
Q2) ________ is a set of drivers,APIs,or other software that improves connectivity between a client application and a server.
Q3) With ___________,or asynchronous primitives,a process is not suspended as a result of issuing a Send or Receive.
Q4) Implementing an extranet removes the need for a company to maintain a public web site.
A)True
B)False
Q5) A server-based processing model uses a "fat server" rather than a "fat client".
A)True
B)False
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Chapter 10: Internet-Based Applications
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Q1) Which of the following types of intermediate devices can be used in an HTTP network?
A)proxies
B)gateways
C)tunnels
D)all of the above
Q2) When HTTPS is used,which element of the communication is encrypted?
A)URL of the requested document
B)contents of the document
C)cookies sent from browser to server
D)all of the above
Q3) End users should not run virus protection software that examines incoming mail because the administrators of the email servers have already checked for viruses.
A)True
B)False
Q4) A ________ is an intermediary program that acts as both a server and a client for the purpose of making requests on behalf of other clients.
Q5) HTTP is a ________ protocol; each transaction is treated independently.
Q6) A _______ is a network data object or service that can be identified by a URL.
12
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Chapter 11: Internet Operation
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Q1) _________ is an identifier for a set of interfaces in which a packet is delivered to all interfaces identified by that address.
Q2) IGMP takes advantage of the broadcast nature of a LAN to provide an efficient technique for the exchange of information among multiple hosts and routers.
A)True
B)False
Q3) The term _________ refers to two routers that share the same network.
Q4) A QoS facility allows the Internet to treat all classes of traffic equally in order to optimize the services provided to all users.
A)True
B)False
Q5) A practical application for multicasting is:
A)teleconferencing
B)multimedia
C)database
D)all of the above
Q6) Three functional procedures are involved in the Border Gateway Protocol (BGP): neighbor acquisition,neighbor reachability,and __________.
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Chapter 12: Lan Architecture and Infrastructure
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Q1) The major difference between Category 3 UTP and Category 5 UTP is that the latter uses a larger sized wire for the conductors.
A)True
B)False
Q2) The kinds of data processing equipment to be supported in a typical business organization can be grouped into three categories: personal computers and workstations,server farms,and _________.
Q3) In most _______________ protocols,the data link protocol entity is responsible not only for detecting errors using the CRC,but for recovering from those errors by retransmitting damaged frames.
A)data link control
B)logical link control
C)media access control
D)all of the above
Q4) LAN protocol architectures are more concerned with cabling infrastructure and less concerned with providing services needed by network attached devices to share the LAN transmission medium.
A)True
B)False
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Chapter 13: Ethernet, switches, and Virtual Lans
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Q1) _________ makes it possible to distribute both power and data using Ethernet cabling.
A)VLAN
B)PoE
C)MAC
D)CSMA
Q2) A _________ is a logical subgroup within a LAN that is created by software rather than by physically moving and separating devices.
Q3) ___________ refers to a set of specifications developed by the IEEE 802.3 committee to provide a low-cost,Ethernet-compatible LAN operating at 100 Mbps.
Q4) This option makes use of four pairs of Category 5 UTP to support devices over a range of up to 100 m.
A)1000BASE-SX
B)1000BASE-T
C)1000BASE-LX
D)1000BASE-CX
Q5) Segmenting a larger network into ___________ domains can help to prevent a fault in one network segment from affecting the entire network.
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Chapter 14: Wireless Lans
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Q1) When using a wireless LAN with a notebook computer,it is necessary for the computer not to move while the connection is active.
A)True
B)False
Q2) A wireless LAN is easier than wired LANs because there are fewer requirements for capacity and connectivity.
A)True
B)False
Q3) __________ antenna architecture is the most important of the enhancements provided by 802.11n.
Q4) WLANs use one of three transmission techniques: spread spectrum, narrowband microwave,and __________.
Q5) When using wireless network,roaming occurs when a mobile stations moves from one access point (or cell)to another.
A)True
B)False
Q6) The _________ service enables transfer of data between a station on an IEEE 802.11 LAN and a station on an integrated IEEE 802.x LAN.
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Chapter 15: Wan Technology and Protocol
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Q1) An advantage of packet switching over circuit switching is:
A)line efficiency is better
B)priorities can be used
C)can carry out data-rate conversion
D)all of the above
Q2) In most networks,not every sender / receiver pair can be connected.
A)True
B)False
Q3) _______ are the devices that attach to the network.
A)Subscribers
B)Subscriber line
C)Exchanges
D)Trunks
Q4) Presence information is associated with every presentity in the system and is maintained by the presence service.
A)True
B)False
Q5) A public telecommunications network can be described using four generic architectural components: subscribers,subscriber line,exchanges,and _________.
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Chapter 16: Wan Services
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Q1) ____________ directs data from one network node to the next based on short path labels rather than longer IP network addresses.
Q2) Frame Relay is a more streamlined communication process than X.25.
A)True
B)False
Q3) Which of the following are LAN protocols?
A)X.25
B)ATM
C)Token Ring
D)all of the above
Q4) The _________ field indicates the type of information in the information field.
A)PT
B)VPI
C)GFC
D)CRC
Q5) All Frame Relay nodes contain which of the following protocols?
A)LAPB
B)LAPD
C)LAPF Core
D)LAPF Control
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Chapter 17: Wireless Lans
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Q1) Satellite communications is comparable in importance to optical fiber in the evolution of telecommunications and data communications.
A)True
B)False
Q2) Wireless communications is likely to be viewed as an essential part of an enterprise network infrastructure when:
A)Mobile communication is needed
B)Communication must take place in a hostile or difficult terrain that makes wired communication difficult or impossible
C)Communication facilities must be installed at low initial cost
D)The same information must be broadcast to many locations
Q3) The antenna systems on or near the earth are referred to as earth _________ .
Q4) The Wireless Application Protocol (WAP)is:
A)proprietary protocol developed in the USA for wireless security
B)dependent on the specific network technologies employed
C)an Internet standard that replaces HTML,HTTP,and XML
D)designed to overcome many of the limitations hindering acceptance of mobile data services
Q5) Transmissions from the satellite to the earth station are __________.
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Chapter 18: Computer and Network Security Threats
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Q1) _________ refers to the altering or replacing of valid data or the introduction of false data into a file or database.
Q2) The three key objectives of computer security are confidentiality, integrity,and availability.
A)True
B)False
Q3) A masquerader is a legitimate user who accesses data,programs,or resources for which such access is not authorized.
A)True
B)False
Q4) Which of the following is not an example of intrusion:
A)guessing and cracking passwords
B)running a packet sniffer on a workstation to capture user names and passwords
C)using an unattended,logged-in workstation without permission
D)all of the above are examples of intrusion
Q5) A _________ is code embedded in some legitimate program that is set to "explode" when certain conditions are met.
Q6) A loss of __________ is the disruption of access to or use of information or an information system.
Page 20
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Chapter 19: Computer and Network Security Techniques
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Q1) A __________ is a security service that monitors and analyzes system events for the purpose of finding,and providing real-time or near-real-time warning of, attempts to access system resources in an unauthorized manner.
Q2) A _________ is a hardware or software entity inserted between a system or network to be protected and the Internet or other outside access network to control traffic in both directions to enforce a security policy.
Q3) Ipsec is based primarily upon the DES standard. A)True B)False
Q4) IP-level security encompasses three functional areas: authentication, confidentiality,and _________.
Q5) ____________ integrates with the operating system of a host computer and monitors program behavior in real time for malicious actions and then blocks potentially malicious actions before they have a chance to affect the system.
Q6) The SSL Record Protocol provides two services for SSL connections: confidentiality and ___________.
Q7) ___________ is a set of protocols for providing encryption,authentication,and key management for IP.
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