Computer Networks
Chapter Exam Questions
Course Introduction
Computer Networks is a comprehensive course that explores the fundamental principles and technologies underlying modern communication networks. Students will examine the architecture, protocols, and standards that enable reliable data exchange across wired and wireless networks. Key topics include the TCP/IP model, data link and physical layers, network routing, congestion control, switching, network security, and emerging trends such as cloud networking and the Internet of Things (IoT). Through theoretical learning and hands-on labs, students will gain practical skills in network configuration, troubleshooting, and analysis, preparing them for further study or careers in networking and information technology.
Recommended Textbook Network+ Guide to Networks 5th Edition by Tamara Dean
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Chapter 1: An Introduction to Networking
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Q1) The distinct units of data that are exchanged between nodes on a network. Answer: H
Q2) The simplest form of a network is a client/server network.
A)True
B)False
Answer: False
Q3) Describe the network specialties currently in high demand.
Answer: The following specialties are currently in high demand:
·Network security
·Convergence (the delivery of voice,video,and data over a single network)
·In-depth knowledge about one or more NOSs: UNIX,Linux,Mac OS X Server,Microsoft
Windows Server 2003,or Windows Server 2008
·Network management
·Internet and intranet design
·Configuration and optimization of routers and switches
·Centralized data storage and management for large-scale environments
Q4) _________________________ refers to the centralized management of multiple network-based communications.
Answer: Unified communications
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Chapter 2: Network Standards and the OSI Model
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Q1) Which type of protocol is useful when data must be transferred quickly?
A) connection-oriented
B) connectionless
C) TCP
D) IP
Answer: B
Q2) Which IEEE standard describes specifications for wireless transmissions?
A) 802.1
B) 802.3
C) 802.5
D) 802.11
Answer: D
Q3) ____ is the process of reconstructing segmented data.
A) Reassembly
B) Reengineering
C) Resegmenting
D) Realigning
Answer: A
Q4) Manages end-to-end delivery of data.
Answer: G
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Chapter 3: Transmission Basics and Networking Media
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Q1) Explain the makeup of twisted pair wire.
Answer: Twisted pair cable consists of color-coded pairs of insulated copper wires,each with a diameter of 0.4 to 0.8 mm (approximately the diameter of a straight pin).Every two wires are twisted around each other to form pairs,and all the pairs are encased in a plastic sheath.The number of pairs in a cable varies,depending on the cable type.
Q2) Describe what FDM (frequency division multiplexing)is and how it works.
Answer: FDM (frequency division multiplexing)is a type of multiplexing that assigns a unique frequency band to each communications subchannel.Signals are modulated with different carrier frequencies,then multiplexed to simultaneously travel over a single channel.The first use of FDM was in the early 20th century when telephone companies discovered they could send multiple voice signals over a single cable.That meant that rather than stringing separate lines for each residence (and adding to the urban tangle of wires),they could send as many as 24 multiplexed signals over a single neighborhood line.Each signal was then demultiplexed before being brought into the home.
Q3) The use of 1s and 0s to represent information is characteristic of a(n)____________________ system.
Answer: binary
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Chapter 4: Introduction to TCP/IP Protocols
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Q1) Explain one way in which BOOTP and RARP are similar.Then describe two ways in which they are different.
Q2) Describe the Time to Live (TTL)field in an IP datagram.
Q3) If a device does not know its own IP address,it can still use ARP.
A)True
B)False
Q4) A(n)____________________ is a special 32-bit number that,when combined with a device's IP address,informs the rest of the network about the segment or network to which the device is attached.
Q5) ____ ARP table entries are created when a client makes an ARP request that cannot be satisfied by data already in the ARP table.
A) Static
B) Dynamic
C) Temporary
D) On-demand
Q6) Any hosts on the Internet that need to look up domain name information.
Q7) Define and describe Zeroconf (Zero Configuration).
Q8) The most common way of expressing IP addresses.
Q9) Define and describe DDNS (Dynamic DNS).
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Chapter 5: Topologies and Ethernet Standards
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Q1) 1In a(n)____________________ topology,every node on the network is connected through a central device,such as a hub,router,or switch.
Q2) On an Ethernet network,a(n)____ is the portion of a network in which collisions occur if two nodes transmit data at the same time.
A) collision domain
B) crash domain
C) interference domain
D) duplicate domain
Q3) A physical topology ____.
A) specifies device types
B) depicts a network in broad scope
C) specifies connectivity methods
D) specifies addressing schemes
Q4) The most common 1-Gigabit Ethernet.
Q5) As part of CSMA/CD,a process known as ____________________ allows the NIC issue a special 32-bit sequence that indicates to the rest of the network nodes that its previous transmission was faulty and that those data frames are invalid.
Q6) Describe the advantage of the star topology.
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Chapter 6: Network Hardware
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Q1) ____ routing is a technique in which a network administrator programs a router to use specific paths between nodes.
A) Static
B) Dynamic
C) Best path
D) Link-state
Q2) A ____ is a multiport connectivity device that directs data between nodes on a network.
A) switch
B) bridge
C) router
D) gateway
Q3) PCIe slots vary depending on the number of ____ they support.
A) lanes
B) labels
C) cards
D) processors
Q4) Describe how a bridge translates between two segment types.
Q5) Explain hybrid routing protocols.Describe an example.
Q6) External peripheral device specifying 32-bit interface running at 33 MHz.
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Chapter 7: WANs and Remote Connectivity
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Q1) The PPTP VPN tunneling protocol is based on technology developed by Cisco.
A)True
B)False
Q2) WANs typically send data over ____ available communications networks.
A) privately
B) publicly
C) individually
D) serially
Q3) The individual geographic locations connected by a WAN are known as ____.
A) WAN sites
B) WAN links
C) network service providers
D) central offices
Q4) Describe the most important advantage of SONET.
Q5) ____ is the preferred communications protocol for remote access communications.
A) SLIP
B) IP
C) PPP
D) TCP/IP
Q6) Provides equal capacity for data traveling both upstream and downstream.
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Chapter 8: Wireless Networking
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Q1) The receiver can be located anywhere within the transmitter's range.
Q2) A directional antenna issues wireless signals along a(n)____ direction.
A) open
B) narrow
C) wide
D) single
Q3) The use of multiple frequencies to transmit a signal is known as ____________________ technology.
Q4) ____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.
A) Channel bonding
B) Channel aggregation
C) Frame aggregation
D) Frame bonding
Q5) Satellite return Internet access is a(n)____ technology.
A) symmetrical
B) asymmetrical
C) proprietary
D) open source
Q6) Describe how interference can distort and weaken a wireless signal.
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Chapter 9: Network Operating Systems
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Q1) A workgroup is a group of interconnected computers that share each other's resources without relying on a central ____.
A) OU
B) domain
C) database
D) server
Q2) A(n)____ is a routine of sequential instructions that runs until it has achieved its goal.
A) process
B) thread
C) activity
D) job
Q3) In every NOS,groups form the basis for resource and account management.
A)True
B)False
Q4) The printer queue is a ____ representation of the printer's input and output.
A) virtual
B) logical
C) physical
D) hierarchical
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Chapter 10: In-Depth TCP/IP Networking
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Q1) The gateways that make up the Internet backbone are called ____________________.
Q2) ________________________________________ is the protocol responsible for moving messages from one mail server to another over TCP/IP-based networks.
Q3) Within a classful addressing,____ is the default subnet mask for a Class C address.
A) 255.255.255.255
B) 255.255.255.0
C) 255.255.0.0
D) 255.0.0.0
Q4) ____________________ separates a network into multiple logically defined segments,or subnets.
Q5) Allows an administrator to query a DNS database and find the host name associated with a specific IP address or vice versa.
Q6) IMAP4 servers require less storage space and usually more processing resources than POP servers do.
A)True
B)False
Q7) Explain what happens when an administrator issues the mtr command.
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Q8) Useful only on networks that run Windows-based operating systems and NetBIOS.
Chapter 11: Voice and Video Over IP
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Q1) One drawback to ____ video is that content may not be edited before it's distributed.
A) on demand
B) live streaming
C) streaming server
D) VoIP
Q2) The H.323 protocol that handles call or videoconference signaling.
Q3) When a caller uses an IP telephone,his or her voice is immediately digitized and issued from the telephone to the network in ____ form.
A) segment
B) frame
C) circuit
D) packet
Q4) Attempts to reserve a specific amount of network resources for a transmission before the transmission occurs.
Q5) It is more difficult to transmit VoIP and video over IP signals over a packet-switched network than it is to transmit data signals.
A)True
B)False
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Chapter 12: Network Security
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Q1) Describe an advantage of using EAP.
Q2) Human errors,ignorance,and omissions cause more than half of all security breaches sustained by networks.
A)True
B)False
Q3) Software that can react to suspicious activity.
Q4) A router that is not configured to drop packets that match certain suspicious characteristics is an example of a risk associated with ____.
A) people
B) transmission and hardware
C) protocols and software
D) Internet access
Q5) The use of certificate authorities to associate public keys with certain users is known as ____.
A) PGP
B) PKI
C) IPSec
D) SSL
Q6) Describe what distinguishes 802.1x from other authentication standards.
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Chapter 13: Troubleshooting Network Problems
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Q1) A ____ can generate traffic in an attempt to reproduce a network problem and monitor multiple network segments simultaneously.
A) multimeter
B) cable performance tester
C) network monitor
D) protocol analyzer
Q2) ____ is a fundamental property of wire that depends on a wire's molecular structure and size.
A) Voltage
B) Current
C) Resistance
D) Impedance
Q3) A ____ usually results from a bad NIC.
A) jabber
B) ghost
C) giant
D) runt
Q4) Instrument that checks whether a cable is conducting current.
Q5) Describe three advantages of using wireless network tools.
Q6) Describe how a performance tester compares to a continuity tester.
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Chapter 14: Ensuring Integrity and Availability
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Q1) A program that disguises itself as something useful but actually harms your system is called a ____.
A) virus
B) worm
C) bot
D) Trojan horse
Q2) Explain why it is important to keep backups,boot disks,and emergency repair disks current and available.
Q3) Fluctuation in voltage levels caused by other devices on the network or electromagnetic interference.
Q4) A complete power loss.
Q5) A(n)____ is a deviation from a specified level of system performance for a given period of time.
A) fault
B) failure
C) error
D) hoax
Q6) Define disk duplexing and describe how it is related to disk mirroring.
Q7) Define and describe a virus.
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Chapter 15: Network Management
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Q1) ____ management refers to monitoring how well links and devices are keeping up with the demands placed on them.
A) Performance
B) Fault
C) Network
D) Configuration
Q2) A(n)____ is a graphical representation of a network's wired infrastructure.
A) Multi Router Traffic Grapher
B) network diagram
C) wiring schematic
D) event viewer
Q3) Describe the purpose of baseline measurements.
Q4) List six characteristics software running on network devices may use to prioritize traffic.
Q5) A(n)____________________ is a report of the network's current state of operation.
Q6) Part of the TCP/IP suite of protocols and typically runs over UDP on port 161.
Q7) Changes to ____________________ applications affect all users at once.
Q9) Explain how to gather baseline data on a network. Page 17
Q8) Addresses the security and privacy of medical records.
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