Computer Networks Review
Questions
Course Introduction
Computer Networks is a foundational course that explores the principles, design, and implementation of modern computer communication systems. Students will learn about network architectures, protocols, and hardware, focusing on concepts such as the OSI and TCP/IP models, data transmission, switching, and routing. The course covers key technologies including Ethernet, wireless networks, IP addressing, and network security. Through theoretical concepts and practical lab assignments, students gain hands-on experience in configuring and troubleshooting networks, preparing them for further specialization in network administration, security, or advanced communication systems.
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) The merging together of two or more businesses or technologies is termed
A) convergence
B) inversion
C) manipulation
D) commercilization
Answer: A
Q2) The TCP/IP ____ layer supports network applications and may include presentation services.
A) transport
B) application
C) network
D) network access
Answer: B
Q3) The two most common architectures known today are the Open Systems Interconnection (OSI)model and the ____________________ protocol suite.
Answer: TCP/IP
Q4) Computer networks that use radio waves are termed ____________________ and can involve broadcast radio,microwaves,or satellite transmissions.
Answer: wireless
Page 3
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Chapter 2: Fundamentals of Data and Signals
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) ____ is an 8-bit code allowing 256 possible combinations of textual symbols.
A) EBCDIC
B) Unicode
C) NRZI
D) UTF-9
Answer: A
Q2) Like signals,data can be analog or digital.
A)True
B)False
Answer: True
Q3) Three currently popular modulation techniques for encoding digital data and transmitting it over analog signals are amplitude shift keying,frequency shift keying,and ____ shift keying.
A) noise
B) baud
C) strength
D) phase
Answer: D
Q4) ____________________ is the opposite of attenuation.
Answer: Amplification
Page 4
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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) ____ is the designation for a digital telephone circuit that transmits voice or data at 1.544 Mbps.
A) ISDN
B) T-1
C) VSAT
D) T-32
Answer: B
Q2) Two major coaxial cable technologies exist and are distinguished by the type of signal each carries: baseband and ____________________.
Answer: broadband
Q3) Light traveling through air experiences little resistance.
A)True
B)False
Answer: True
Q4) ____________________ is the digital equivalent of analog cellular telephone service.
Answer: Digital-Advanced Mobile Phone Service (D-AMPS)
Digital-Advanced Mobile Phone Service
D-AMPS
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Chapter 4: Making Connections
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Sample Questions
Q1) To prepare a data character for an asynchronous transmission,a few extra bits of information are added to the data bits of the character to create a(n)____________________.
Q2) The procedural component of USB is probably the most involved of the four components.
A)True
B)False
Q3) With ____ connections,polling is not necessary because there is only one terminal per line.
A) point-to-point
B) multipoint
C) terminal-to-point
D) primary-to-point
Q4) An asynchronous connection is the most complex example of a data link protocol.
A)True
B)False
Q5) What was the early disadvantage of USB?
Q6) A(n)____________________ connection is a single wire with the mainframe connected on one end and multiple terminals connected on the other end.
Page 6
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Chapter 5: Making Connections Efficient: Multiplexing and Compression
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96 Verified Questions
96 Flashcards
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Sample Questions
Q1) SONET and SDH are both ____ multiplexing techniques.
A) synchronous
B) statistical
C) empirical
D) random
Q2) In ____________________,the sharing of the medium is accomplished by dividing available transmission time among users.
Q3) ____ technology is a unique form of multiplexing in that all the subchannels multiplexed together are intended for one user.
A) Time division
B) Discrete multitone
C) Frequency division
D) Code division
Q4) How does time division multiplexing work?
Q5) Dense wavelength division multiplexing is an expensive way to transmit signals from multiple devices due to the high number of differently colored lasers required in one unit. A)True
B)False
7
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Chapter 6: Errors, Error Detection, and Error Control
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75 Verified Questions
75 Flashcards
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Sample Questions
Q1) List and briefly explain some error-prevention techniques.
Q2) White noise is also called thermal noise or ____ noise.
A) crosstalk
B) jitter
C) Gaussian
D) spike
Q3) A ____ protocol's function is simply to inform the transmitter what piece of data is expected next.
A) CRC-16
B) CRC-32
C) stop-and-wait
D) sliding window
Q4) Simple parity can detect only an even number of erroneous bits per character.
A)True
B)False
Q5) ____ is probably the most common form of error control.
A) Toss the frame (do nothing)
B) Correct the error without retransmission
C) Sending a message back to the transmitter
D) Correct the error with retransmission
8
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Chapter 7: Local Area Networks: Part I
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Sample Questions
Q1) ____________________ (nicknamed Cheapernet)was designed to allow for a less-expensive network by using less-expensive components.
Q2) A(n)____________________ occurs when two or more workstations listen to the medium at the same moment,hear nothing,and then transmit their data at the same moment.
Q3) The ____________________ allows for a CSMA/CD network to simultaneously transmit and receive data to and from a workstation.
Q4) The most popular example of a contention-based protocol is the token-passing protocol.
A)True B)False
Q5) The ____________________ Ethernet standard is also known as IEEE 802.3ae.
Q6) To promote acceptance,the ____________________ suite of protocols was created to support the many different types of wireless local area networks in existence.
Q7) Using coaxial cable to transmit analog signals,10Broad36 can transmit data at 10 Mbps for a maximum segment distance of 3600 meters.
A)True B)False
Page 9
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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) Microsoft Windows 7 is an example of a desktop operating system.
A)True
B)False
Q2) ____________________ allows all future print requests to be automatically forwarded to the network printer in an operation that is transparent to both you and the application.
Q3) 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
Q4) On most network operating systems,the client workstation must be loaded with a substantial set of software.With ____,all a user needs on his or her client workstation is a Web browser.
A) NetWare 3
B) NetWare 4
C) NetWare 5
D) NetWare 6
Q5) What are some of the features offered by Windows 2003/2008?
Page 10
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Chapter 9: Introduction to Metropolitan Area Networks and
Wide Area Networks
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Sample Questions
Q1) A(n)____________________ network application provides some guarantee that information traveling through the network will not be lost.
Q2) ____ is advantageous when a copy of a packet needs to get to all nodes.
A) Flooding
B) Dijkstra's least-cost
C) Dijkstra's shortest-path
D) Dijkstra's maximum-cost
Q3) ____ routing involves storing all the routing information at one central location.
A) Distributed
B) Centralized
C) Remote
D) Fixed
Q4) A wide area network's sub-network,or cloud,may be categorized by the way it transfers information from one end of the sub-network to the other.
A)True
B)False
Q5) Briefly explain the most important aspects of a Metro Ethernet.
Page 11
Q6) The speed at which a failover is performed is the ____________________.
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Chapter 10: The Internet
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Sample Questions
Q1) The protocol that resides at the ____ layer in the TCP/IP protocol suite is called Internet Protocol (IP).
A) application
B) transport
C) network
D) network access
Q2) ____ is the gathering and use of the browsing habits of potential and current customers,which is important data for many companies.
A) Micro-marketing
B) E-retailing
C) VoIP
D) EDI
Q3) The TCP header ____ field contains a 32-bit value that counts bytes and indicates a packet's data position within the connection.
A) Source Port
B) Padding
C) Sequence Number
D) Window
Q4) What are the disadvantages of Voice over IP (VoIP)?
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Chapter 11: Voice and Data Delivery Networks
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Sample Questions
Q1) The ______________________________ paved the way for anybody to offer a local telephone service to homes and businesses.
Q2) The ____________________ is the telephone line that leaves your house or business.
Q3) After the 1984's Modified Final Judgment,the local telephone companies became known as ______________________________.
Q4) What does a business or home user need to establish a DSL connection?
Q5) ____________________ is a slower format compared to ADSL; also known as Universal DSL,G.Lite,and splitterless DSL.
Q6) _____________________________________________ mean that as a person speaks into a telephone,the system can digitize the voice and store it on a hard disk drive as computer data.
Q7) A(n)____________________ is a high-speed communications service that allows high-speed access to wide area networks such as the Internet via a cable television connection.
Q8) Telephone systems were originally designed to transmit the human voice. A)True B)False
Q9) What are the advantages of frame relay?
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Chapter 12: Network Security
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100 Flashcards
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Sample Questions
Q1) In computer terminology,a(n)____________________ is a trap that is set by network personnel in order to detect unauthorized use of a network resource.
Q2) The idea behind ____________________ spread spectrum transmission is to bounce the signal around on random frequencies rather than transmit it on one fixed frequency.
Q3) 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.
Q4) Pings are used most commonly by Unix-based systems.
A)True
B)False
Q5) The ____________________ substitution-based cipher uses multiple alphabetic strings to encode the plaintext,rather than one alphabetic string.
Q6) ____ is data before any encryption has been performed.
A) Plaintext
B) Ciphertext
C) Encriptext
D) Cryptotext
Q7) The ____________________ cipher was devised by Blaise de Vigenére in 1586.
Page 14
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Chapter 13: Network Design and Management
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Sample Questions
Q1) ____ analysis is a common financial analysis technique that involves determining a proposed system's costs and benefits.
A) Payback
B) Time
C) Operational
D) Technical
Q2) ____________________ is the amount of time necessary for the metropolitan area network to reconfigure itself or reroute a packet,should a given link fail.
Q3) The systems development life cycle is a one-time only process.
A)True
B)False
Q4) ______________________________ is the average time necessary to repair a failure within the computer network.
Q5) In order to create a(n)____________________ connectivity map,the modeler begins by identifying each site or location in which the company has an office.
Q6) Setting up a benchmark test can be quite time-consuming.
A)True
B)False
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