Business Data Communications Exam Preparation Guide
Course Introduction
Business Data Communications explores the fundamental concepts and technologies behind the transmission of data in modern businesses. The course covers key topics such as network architectures, data transmission methods, protocols, wireless and wired communication systems, and the role of the Internet in supporting business operations. Students will examine security challenges and solutions, the impact of emerging technologies, and methods for designing efficient and reliable communication networks. Practical applications and case studies are used to demonstrate how effective data communications enable organizations to improve efficiency, collaboration, and decision-making.
Recommended Textbook
Data Communications and Computer Networks A Business Users Approach 8th Edition by Curt
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13 Chapters
1235 Verified Questions
1235 Flashcards
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Page 2
Chapter 1: Introduction to Computer Networks and Data Communications
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76 Verified Questions
76 Flashcards
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Sample Questions
Q1) _________________________ are backup points that are used in case of errors or failures.
Answer: Synchronization points
Q2) The personal area network was created in the late ____.
A) 1970s
B) 1980s
C) 1990s
D) 2000s
Answer: C
Q3) A ____ is an interconnection of computers and computing equipment using either wires or radio waves over small or large geographic areas.
A) personal area network (PAN)
B) computer network
C) wireless network
D) local area network (LAN)
Answer: B
Q4) The application layer of the OSI model is responsible for token management.
A)True
B)False
Answer: False
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Chapter 2: Fundamentals of Data and Signals
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Sample Questions
Q1) ____________________ are the electric or electromagnetic impulses used to encode and transmit data.
Answer: Signals
Q2) A byte consists of 8 bits.
A)True
B)False
Answer: True
Q3) The ____________________ digital encoding scheme transmits 1s as zero voltages and 0s as positive voltages. Answer: nonreturn to zero-level (NRZ-L) nonreturn to zero-level
NRZ-L
Q4) Certain control characters provide data transfer control between a computer source and computer destination.
A)True
B)False
Answer: True
Q5) ____________________ is the opposite of attenuation. Answer: Amplification
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Chapter 3: Conducted and Wireless Media
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103 Verified Questions
103 Flashcards
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Sample Questions
Q1) IEEE 802.16a is a revision of the 802.16 standard that provides a high-speed connection for slowly moving devices.
A)True
B)False
Answer: False
Q2) The typical maximum distance between microwave towers is roughly ____ to 30 miles.
A) 3
B) 6
C) 8
D) 15
Answer: D
Q3) At the end of the twentieth century,approximately 105 MEO satellites were orbiting the Earth.
A)True
B)False
Answer: False
Q4) The ____________________ is the main connecting cable that runs from one end of the installation to another.
Answer: backbone
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Chapter 4: Making Connections
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Sample Questions
Q1) In modem interfacing terminology,the computer (or terminal)end of an interface is referred to as ____.
A) data communicating equipment (DCE)
B) data terminating equipment (DTE)
C) data transmitting equipment (DTE)
D) data receiving equipment (DRE)
Q2) The ____ component of an interface deals with items such as the connector or plug description.
A) administrative
B) functional
C) procedural
D) mechanical
Q3) ____________________ is an easy-to-use,flexible,and low-cost digital interface that is capable of supporting transfer speeds of up to 3.2 Gbps.
Q4) A(n)____ is simply a high-speed connection to which multiple devices can attach.
A) pin
B) bus
C) circuit
D) interface
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Chapter 5: Making Connections Efficient: Multiplexing and Compression
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Sample Questions
Q1) ____,which is an abbreviation for MPEG (Moving Picture Experts Group)Audio Layer-3,is a common form of audio compression.
A) MPEG
B) GIF
C) MP3
D) JPEG
Q2) ____________________ is a relatively new technology that has been used extensively by both the military and cellular telephone companies.
Q3) The technique of transmitting multiple signals over a single medium is ____________________.
Q4) SONET was developed in the United States by ____.
A) ISO
B) ANSI
C) IEEE
D) IETF
Q5) Synchronous time division multiplexing does not require as high-speed a line as statistical time division multiplexing does.
A)True
B)False
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Chapter 6: Errors, Error Detection, and Error Control
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75 Flashcards
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Sample Questions
Q1) TCP performs error detection at the end points of the connection.
A)True
B)False
Q2) The CRC error-detection method treats the packet of data to be transmitted as a large polynomial.
A)True
B)False
Q3) ____ error control is a technique usually associated with the Stop-and-wait flow control protocol.
A) Stop-and-wait
B) Timeout
C) Sliding window
D) ACK
Q4) When a digital signal is being transmitted,the rises and falls of the signal can start to shift,or become blurry,and thus produce ____________________.
Q5) If the impulse spike interferes with an analog signal,removing it without affecting the original signal is extremely easy.
A)True
B)False
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Chapter 7: Local Area Networks: Part I
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Sample Questions
Q1) In a ____ architecture,the data frame begins to exit the switch almost as soon as it begins to enter the switch.
A) forward
B) backward
C) cut-through
D) random-propagation
Q2) One of the more interesting applications for a dedicated segment network and a switch is creating a ____.
A) virtual LAN
B) dedicated LAN
C) shared LAN
D) local LAN
Q3) The bus/tree topology was the first physical design used when local area networks became commercially available in the late 1970s.
A)True
B)False
Q4) The ______________________________ is an electronic device that performs the necessary signal conversions and protocol operations that allow the workstation to send and receive data on the network.
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Chapter 8: Local Area Networks: Part II
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113 Verified Questions
113 Flashcards
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Sample Questions
Q1) The ____ is essentially the interface device between the wireless user device and the wired local area network.
A) wireless server
B) wireless workstation
C) NIC
D) access point
Q2) Windows 2008 Server is a network operating system designed to run over a network of microcomputer workstations and provide file sharing and peripheral sharing.
A)True
B)False
Q3) Unlike NetWare's NDS,Active Directory creates a hierarchical structure of resources.
A)True
B)False
Q4) In reality,a multitasking operating system runs only one program at a time.
A)True
B)False
Q5) What are some of the features offered by Windows 2003/2008?
Q6) What are the functions performed by a network operating system?
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Chapter 9: Introduction to Metropolitan Area Networks and
Wide Area Networks
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Sample Questions
Q1) A network limit,called the ____,can be placed on how many times any packet is copied.
A) hop limit
B) hop count
C) time to live
D) time to hop
Q2) A wide area network connects its workstations through the use of a ____ design and requires routing to transfer data across the network.
A) bus
B) star
C) mesh
D) ring
Q3) ____________________ routing is a dynamic technique in which routing tables react to network fluctuations,such as congestion and node/link failure.
Q4) In a(n)____________________ packet-switched network,all packets that belong to a logical connection can follow the same path through the network.
Q5) A company that has a connection with Metro Ethernet can create a(n)____________________ for that connection.
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Chapter 10: The Internet
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Sample Questions
Q1) The most popular protocol that handles dynamic assignment of IP addresses is ________________________________________.
Q2) In 1983,the Department of Defense broke the ARPANET into two similar networks: the original ARPANET and ____.
A) MILNET
B) NSFnet
C) CampusNET
D) DoDNET
Q3) What are the disadvantages of Voice over IP (VoIP)?
Q4) During the late 1960s,ARPA created one of the country's first wide area packet-switched networks,the ____________________.
Q5) The primary function of ___________________________________ is to turn an unreliable network into a reliable network that is free from lost and duplicate packets.
Q6) When an intranet is extended outside the corporate walls to include suppliers,customers,or other external agents,it becomes a(n)____________________.
Q7) The term that has come to represent a business's commercial dealings over the Internet is ____________________.
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Chapter 11: Voice and Data Delivery Networks
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Sample Questions
Q1) In ____,a fax image that is stored on a LAN server's hard disk can be downloaded over a local area network,converted by a fax card,and sent out to a customer over a trunk.
A) third-party call control
B) unified messaging
C) fax processing
D) integrated voice recognition and response
Q2) ______________________________ ,like frame relay,is a very high-speed,packet-switched service that is offered by the telephone companies.
Q3) The ____ allows the customer to exceed the committed information rate by a fixed amount for brief moments of time.
A) bit rate
B) burst rate
C) committed information rate (CIR)
D) LATA rate
Q4) The ______________________________ paved the way for anybody to offer a local telephone service to homes and businesses.
Q5) ____________________ lines and tie lines are leased telephone lines that require no dialing.
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Chapter 12: Network Security
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Sample Questions
Q1) Some computer systems generate random passwords that are very difficult to guess,but are also hard to remember.
A)True
B)False
Q2) Both SSL and IPsec may eventually give way to S-HTTP,the newer security standard created by the Internet Engineering Task Force.
A)True
B)False
Q3) Pings are used most commonly by Unix-based systems.
A)True
B)False
Q4) Many people consider the Trojan horse to be a form of computer ____.
A) virus
B) firewall
C) router
D) switch
Q5) With ____________________,the data is encrypted using DES three times-the first time by a first key,the second time by a second key,and the third time by the first key again.
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Chapter 13: Network Design and Management
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Sample Questions
Q1) A new parameter that might have an impact on metropolitan area design is the
A) link shadow
B) node distance
C) link length
D) failover time
Q2) Three different modeling techniques can be used: ____ area connectivity maps,metropolitan area connectivity maps,and local area connectivity maps.
A) personal
B) wide
C) world
D) universal
Q3) A system's ____________________ feasibility is the extent to which the system can be installed in a timely fashion and meets organizational needs.
Q4) Capacity planning is a fairly easy and fast operation.
A)True
B)False
Q5) A managed element has management software,called a(n)____________________,running in it.
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