Network Security Fundamentals
Pre-Test Questions
Course Introduction
Network Security Fundamentals introduces the essential concepts, principles, and practices necessary to secure computer networks. The course covers topics such as common threats and vulnerabilities, cryptographic techniques, authentication protocols, firewalls, intrusion detection and prevention systems, and security policies. Students will explore the mechanisms used to safeguard data in transit and at rest, as well as strategies for responding to network breaches. Emphasis is placed on both theoretical understanding and practical application through hands-on lab exercises, preparing students to assess and defend networked environments against evolving cyber threats.
Recommended Textbook
Data Communications and Computer Networks A Business Users Approach 7th Edition by Curt
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13 Chapters
1238 Verified Questions
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Chapter 1: Introduction to Computer Networks and Data Communications
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Sample Questions
Q1) One of the most explosive areas of growth in recent years has been cellular phone networks.
A)True
B)False
Answer: True
Q2) The ______________ layer of the TCP/IP protocol suite is responsible for making sure that what leaves one end of the network arrives at the other end of the network exactly the same.
Answer: transport
Q3) _________________________ are backup points that are used in case of errors or failures.
Answer: Synchronization points
Q4) Telnet is used to allow a remote user to log in to another computer system. A)True
B)False
Answer: True
Q5) The ____________________ layer of the OSI model is responsible for taking data from the network layer and transforming it into a cohesive unit called a frame. Answer: data link
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Chapter 2: Fundamentals of Data and Signals
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Sample Questions
Q1) Amplitude shift keying is susceptible to sudden noise impulses such as the static charges created by a lightning storm.
A)True
B)False
Answer: True
Q2) The Manchester encoding schemes solve the synchronization problem but are relatively inefficient because they have a baud rate that is ____ the bps.
A)equal to B)twice
C)three times
D)four times
Answer: B
Q3) The control character ____________________ (CR) provides control between a processor and an input/output device.
Answer: carriage return
Q4) The set of all textual characters or symbols and their corresponding binary patterns is called a(n) ____________________.
Answer: data code
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Chapter 3: Conducted and Wireless Media
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Sample Questions
Q1) ____ cable ranges in size from approximately 6 to 10 mm or more (1/4 to 3/8 inch) in diameter.
A)Thin coaxial
B)Thick coaxial
C)CAT 2
D)CAT 3
Answer: B
Q2) Category 1 twisted pair wire is not recommended for transmitting megabits of computer data.
A)True
B)False
Answer: True
Q3) The braided metal shield is very good at blocking electromagnetic signals from entering the cable and producing noise.
A)True
B)False
Answer: True
Q4) Multimode fiber-optic cable is labeled ____________________ cable. Answer: 62.5/125
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Chapter 4: Making Connections
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Sample Questions
Q1) USB is an example of a full-duplex connection.
A)True
B)False
Q2) ____________________ connection provides guaranteed data transport at a predetermined rate.
Q3) An asynchronous connection is the most complex example of a data link protocol.
A)True
B)False
Q4) InfiniBand can support data transfer speeds of ____ per second.
A)1.5 billion bits (1.5 gigabits)
B)2.5 billion bits (2.5 gigabits)
C)5 billion bits (5 gigabits)
D)10 billion bits (10 gigabits)
Q5) An interface standard can consist of four parts, or components, all of which reside at the ____ layer.
A)network
B)data link
C)physical
D)transport
Q6) A(n) ____________________ bit performs an error check on only the data bits.
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Chapter 5: Making Connections Efficient: Multiplexing and Compression
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Sample Questions
Q1) In general, the device that accepts input from one or more users is called the ____________________.
Q2) ____________________ is a multiplexing technique commonly found in digital subscriber line (DSL) systems.
Q3) ____ multiplexes multiple data streams onto a single fiber-optic line.
A)Statistical time division multiplexing (Stat TDM)
B)Wavelength division multiplexing (WDM)
C)Time division multiplexing (TDM)
D)Channel division multiplexing (CDM)
Q4) A video device displays multiple (typically 30) frames per second.
A)True
B)False
Q5) What are the major disadvantages of frequency division multiplexing?
Q6) Code division multiplexing uses ____________________ spread spectrum technology.
Q7) WDM supports multiple lambdas.
A)True
B)False
Q8) With a(n) ____________________ compression technique, no data is lost due to compression. Page 7
Q9) ____________________ are the codes assigned to users in CDM.
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Chapter 6: Errors, Error Detection, and Error Control
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Sample Questions
Q1) Attenuation can be eliminated with the use of repeaters for analog systems.
A)True
B)False
Q2) With ____________________ parity, the 0 or 1 added to the string produces an odd number of binary 1s.
Q3) How does longitudinal parity work?
Q4) In TCP/IP, if a receiver just received some data and wishes to send data back to the sender, then the receiver should include an ACK with the data it's about to send. This is called ____________________.
Q5) When working with stop-and-wait error control, the amount of time a station waits before retransmitting a packet is called ____.
A)stop time
B)ACK time
C)NAK time
D)timeout
Q6) Noise is a problem for both analog and digital signals.
A)True
B)False
Q7) How does the cyclic redundancy checksum work?
Page 9
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Chapter 7: Local Area Networks: Part I
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Sample Questions
Q1) The 802.11 specification defined six different types of physical layer connections.
A)True
B)False
Q2) A ____ system transmits 10-Mbps baseband (digital) signals over twisted pair for a maximum of 100 meters per segment length.
A)1Base5
B)10Broad36
C)10BaseT
D)100BaseTX
Q3) The most popular example of a contention-based protocol is the token-passing protocol.
A)True
B)False
Q4) The logical link control sublayer defines the layout or format of the data frame, simply called the frame.
A)True
B)False
Q5) How does a star-wired bus topology work?
Q6) Explain the switch filtering function.
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Chapter 8: Local Area Networks: Part II
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Sample Questions
Q1) NetWare ____ introduced NetWare Directory Services (NDS).
A)Version 2
B)Version 3
C)Version 4
D)Version 6
Q2) The most recent version of the Windows network operating system is Windows
A)XP
B)2000
C)2003
D)2008
Q3) The primary goal of ____ software is to perform crash stalling, or to try to keep the operating system running long enough to perform a graceful exit.
A)antivirus
B)network monitoring
C)sniffer
D)crash protection
Q4) What are the functions performed by a network operating system?
Q5) Briefly explain the evolution of the wireless LAN protocols.
Q6) What are some of the more common RAID techniques?
Q7) What are the four steps for creating a good and appropriate tree design?
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Chapter 9: Introduction to Metropolitan Area Networks and
Wide Area Networks
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Sample Questions
Q1) A network that expands beyond a metropolitan area is a ____ area network. A)personal
B)local
C)metropolitan D)wide
Q2) A ____ profile describes various characteristics about the connection, such as basic data transfer rates, basic burst rates, excess data transfer rates, and excess burst rates.
A)bandwidth
B)server
C)client D)router
Q3) ______________________________ protocol is a link state algorithm and is still used today by many Internet routers.
Q4) Circuit-switched networks were designed primarily for voice signals.
A)True B)False
Q5) A virtual circuit breaks a large amount of data into n packets. A)True B)False
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Chapter 10: The Internet
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Sample Questions
Q1) Real-Time Streaming Protocol (RTSP) is a(n) ____ layer protocol.
A)physical
B)network
C)transport
D)application
Q2) A(n) ____________________ is a TCP/IP network inside a company that allows employees to access the company's information resources through an Internet-like interface.
Q3) ____ is actually a set of protocols named packet-based multimedia protocols, and it was designed for a wide range of applications (audio and video).
A)H.121
B)H.232
C)H.256
D)H.323
Q4) ________________________________________ is the software that allows the user to save e-mail messages in a server mailbox and download them when desired from the server.
Q5) A(n) ____________________ is a precise identification of a particular application on a particular device.
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Chapter 11: Voice and Data Delivery Networks
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Sample Questions
Q1) ____ means that users utilize a single desktop application to send and receive e-mail, voice mail, and fax.
A)Interactive voice response
B)Unified messaging
C)Fax processing
D)Third-party call control
Q2) A(n) ____________________ is a definition of a type of traffic and the underlying technology that will support that type of traffic.
Q3) A ____ is a bundle of VCCs that have the same endpoints.
A)virtual path connection (VPC)
B)virtual interface connection (VIC)
C)network-network interface
D)network-user interface
Q4) Prior to 1984, AT&T (American Telephone and Telegraph) owned all the long-distance telephone lines in the United States.
A)True
B)False
Q5) The basic telephone system, or ________________________________________, has been in existence since the early 1900s.
14
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Chapter 12: Network Security
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Sample Questions
Q1) 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
Q2) The opposite of asymmetric encryption is ____ encryption, in which one key is used to encrypt and decrypt.
A)available key
B)asymmetric key
C)symmetric
D)public key
Q3) A ____ is a list of certificates that have been revoked before their originally scheduled expiration date.
A)PKI
B)public key cryptography
C)digital certificate
D)certificate revocation list (CRL)
Q4) The DES algorithm works with 128-bit blocks of data.
A)True
B)False
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Chapter 13: Network Design and Management
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Sample Questions
Q1) What are the skills needed by a network administrator?
Q2) When a company is evaluating a project's ____ feasibility, the company must ask: Can the proposed system be designed, built, tested, and installed in an amount of time that all parties find reasonable and to which they can agree?
A)financial
B)technical
C)time
D)operational
Q3) Two technologies in computer networking that often generate revenue are wireless LANs and network security.
A)True
B)False
Q4) The ____________________ feasibility of a system is the extent to which the system can be created and implemented using currently existing technology.
Q5) How do you determine the cost of a system?
Q6) Provide an example of capacity planning using linear projection.
Q7) If only an overview of a local network is desired, then the analyst can create a(n) ____________________ connectivity map.
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