Computer networking MCQ – Change your future

91. It is a group of computers that are connected to each other for the purpose of communication?

Correct Answer: Correct answer is: (B) Computer Network.

Exam Relevance: AP Computer Science Principles, SAT Subject Test in Computer Science

Difficulty: Easy

Concept notes: A computer network is a group of computers connected to each other for the purpose of communication and resource sharing.

Common Mistakes: Students may confuse a computer network with other types of networks, such as file networks or cable networks, which do not specifically refer to a group of computers connected for communication.

Explanations: A computer network is defined as a group of computers that are connected to each other for the purpose of communication and resource sharing. This definition aligns with the description provided in the question. Other options like file network, folder network, and cable network do not specifically refer to a group of computers connected for communication.

Option Analysis:

Option A: File Network is not a standard term for a group of computers connected for communication.
Option B: Computer Network is the correct term for a group of computers connected for communication.
Option C: Folder Network is not a standard term for a group of computers connected for communication.
Option D: Cable Network typically refers to a television network and not a group of computers connected for communication.

92. Using form of abbreviation in IPv6 address, 3210 can be written as

Correct Answer: Correct answer is: (B) Cannot be abbreviated.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: IPv6 addresses are 128-bit addresses represented in hexadecimal notation, divided into eight groups of four hexadecimal digits. Abbreviation rules in IPv6 allow for the removal of leading zeros in each group and the use of double colons to replace consecutive groups of zeros. However, the number 3210 does not meet the criteria for abbreviation as it does not contain consecutive zeros or leading zeros to remove.

Common Mistakes: Students may mistakenly believe that any sequence of numbers can be abbreviated in IPv6, not realizing the specific rules for abbreviation.

Explanations: IPv6 addresses can be abbreviated by removing leading zeros in each group and using double colons to replace consecutive groups of zeros. The number 3210 does not contain consecutive zeros or leading zeros, so it cannot be abbreviated according to IPv6 rules.

Option Analysis:

Option A: Incorrect, as 3210 does not meet the criteria for abbreviation.
Option B: Correct, as 3210 cannot be abbreviated according to IPv6 rules.
Option C: Incorrect, as 3210 does not meet the criteria for abbreviation.
Option D: Incorrect, as 3210 does not meet the criteria for abbreviation.

93. A network of personal computers, each of which acts as both client and server, so that each can exchange files directly with every other computer on the network

Correct Answer: Correct answer is: (A) Peer-to-peer network.

Exam Relevance: Computer Networks, Information Technology, Network Security

Difficulty: Easy

Concept notes: A peer-to-peer network is a decentralized network where each computer (peer) can act as both a client and a server, allowing direct file exchange between any two computers on the network.

Common Mistakes: Students may confuse peer-to-peer networks with client-server networks, where a central server manages all file exchanges.

Explanations: In a peer-to-peer network, each computer can both request and provide resources, eliminating the need for a central server. This allows for direct file sharing and communication between any two computers, making it a suitable answer for the given description.

Option Analysis:

Option A: Correct. Peer-to-peer networks allow each computer to act as both client and server, enabling direct file exchange.
Option B: Incorrect. A client network typically relies on a central server for resource management and does not allow direct peer-to-peer file exchange.
Option C: Incorrect. A server network implies a central server managing all resources, which does not align with the direct file exchange described.
Option D: Incorrect. A social network is a platform for social interaction and does not describe a network architecture for file exchange.

94. ..... is necessary when the sender wants to use IPv6, but the receiver does not understand IPv6.

Correct Answer: Correct answer is: (B) Header translation.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: Header translation is a technique used to enable communication between IPv6 and IPv4 systems.

Common Mistakes: Students may confuse header translation with other IPv6 transition mechanisms like dual stack or tunnelling.

Explanations: Header translation, also known as protocol translation, is necessary when the sender wants to use IPv6, but the receiver does not understand IPv6. This technique translates the IPv6 header to an IPv4 header, allowing the packet to be understood by an IPv4-only receiver. This ensures that communication can still occur between systems that do not support the same IP version.

Option Analysis:

Option A: Dual stack allows a system to use both IPv4 and IPv6 simultaneously, but it does not address the scenario where the receiver does not understand IPv6.
Option B: Header translation is the correct choice as it translates the IPv6 header to an IPv4 header, enabling communication between IPv6 and IPv4 systems.
Option C: Conversion typically refers to a broader process of changing data formats, not specifically addressing the header translation needed for IPv6 to IPv4 communication.
Option D: Tunnelling encapsulates IPv6 packets within IPv4 packets, but it does not directly translate the headers to enable communication with an IPv4-only receiver.

95. A high-performance switching and multiplexing technology that utilizes fixed-length packets to carry different types of traffic

Correct Answer: Correct answer is: (C) SONET.

Exam Relevance: CCNA, CCNP, Network+

Difficulty: Moderate

Concept notes: SONET (Synchronous Optical Network) is a standard for transmitting a wide range of digital traffic over optical fiber using synchronous data transmission.

Common Mistakes: Students may confuse SONET with ATM (Asynchronous Transfer Mode), which also uses fixed-length packets but is not primarily a switching and multiplexing technology for optical fiber.

Explanations: SONET is a high-performance switching and multiplexing technology that uses fixed-length frames to carry different types of traffic over optical fiber. It is designed to provide a standardized way to transport data, voice, and video signals over fiber-optic networks. The fixed-length frames ensure synchronization and efficient multiplexing of various traffic types, making SONET suitable for high-speed, reliable data transmission.

Option Analysis:

Option A: ATM (Asynchronous Transfer Mode) uses fixed-length cells but is not specifically a switching and multiplexing technology for optical fiber.
Option B: ADSL (Asymmetric Digital Subscriber Line) is a type of DSL technology used for internet access over telephone lines, not a switching and multiplexing technology for optical fiber.
Option C: SONET (Synchronous Optical Network) is a high-performance switching and multiplexing technology that uses fixed-length frames to carry different types of traffic over optical fiber.
Option D: This option is incorrect as SONET is the correct answer.

Mnemonic: SONET: Synchronized Optical Network, Think Fiber

96. ..... is the standard mechanism provided by TCP/IP for copying a file from one host to another.

Correct Answer: Correct answer is: (D) None of the above.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The standard mechanism provided by TCP/IP for copying a file from one host to another is not listed among the given options.

Common Mistakes: Students may mistakenly choose TFTP (Trivial File Transfer Protocol) as it is used for file transfer, but it is not the standard mechanism provided by TCP/IP.

Explanations: The standard mechanism for copying files between hosts in a TCP/IP network is typically FTP (File Transfer Protocol) or SCP (Secure Copy Protocol). TELNET is used for remote terminal connections, SMTP is used for email transmission, and TFTP is a simplified file transfer protocol, often used for booting or firmware updates. Since none of these options correctly identify the standard file transfer mechanism, the correct answer is "None of the above."

Option Analysis:

Option A: TELNET is used for remote terminal connections, not for file transfer.
Option B: SMTP is used for email transmission, not for file transfer.
Option C: TFTP is a simplified file transfer protocol, but it is not the standard mechanism for file transfer in TCP/IP.
Option D: None of the above is correct because the standard mechanism for file transfer in TCP/IP is not listed among the options.

97. Which of the following annotation of JAX RS API binds the parameter passed to method to a HTTP matrix parameter in path?

Correct Answer: Correct answer is: (C) @MatrixParam.

Exam Relevance: Java EE, JAX-RS, RESTful Web Services

Difficulty: Moderate

Concept notes: In JAX-RS, the @MatrixParam annotation is used to bind a parameter passed to a method to a HTTP matrix parameter in the path.

Common Mistakes: Students often confuse @MatrixParam with @PathParam or @QueryParam, which are used for different purposes.

Explanations: The @MatrixParam annotation is specifically designed to bind parameters that are part of the matrix parameters in the URI path. Matrix parameters are name-value pairs that appear after a semicolon in a path segment. For example, in the path "/users;age=25", "age" is a matrix parameter. The @MatrixParam annotation allows you to extract and use these matrix parameters within your JAX-RS methods.

Option Analysis:

Option A: @PathParam is used to bind a parameter to a path segment, not to matrix parameters.
Option B: @QueryParam is used to bind a parameter to a query parameter in the URL, not to matrix parameters.
Option C: @MatrixParam is the correct annotation for binding parameters to matrix parameters in the path.
Option D: @HeaderParam is used to bind a parameter to an HTTP header, not to matrix parameters.

Mnemonic: Matrix for MatrixParam, Path for PathParam, Query for QueryParam, Header for HeaderParam.

98. Switch operates at second layer of OSI model that is.....layer.

Correct Answer: Correct answer is: (C) Data link layer.

Exam Relevance: CCNA, Network+, CompTIA Network+

Difficulty: Easy

Concept notes: Switches operate at the Data Link layer of the OSI model, which is the second layer.

Common Mistakes: Students may confuse the Data Link layer with the Physical layer, which is the first layer of the OSI model.

Explanations: Switches operate at the Data Link layer because they use MAC addresses to forward data frames to the correct destination within a local network. This layer is responsible for node-to-node data transfer and uses hardware addresses to ensure data is sent to the correct device.

Option Analysis:

Option A: The Physical layer is the first layer of the OSI model and deals with the physical transmission of data, not the switching of data frames.
Option B: The Network layer is the third layer and is responsible for routing data between different networks, not for switching within a local network.
Option C: The Data link layer is the correct layer for switches as they use MAC addresses to forward data frames within a local network.
Option D: The Transport layer is the fourth layer and is responsible for end-to-end communication, not for switching data frames.

Mnemonic: Data Link Layer: "D" for Data, "L" for Link, "L" for Layer.

99. For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?

Correct Answer: Correct answer is: (B) Hardware and software.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Easy

Concept notes: Data communications require both hardware and software components to function effectively.

Common Mistakes: Students may mistakenly believe that only hardware or only software is necessary for data communications.

Explanations: Data communications involve the transmission of data between devices. This process requires both hardware (such as network cards, routers, and cables) and software (such as protocols and applications) to ensure that data is transmitted accurately and efficiently. Without both components, the communication system would not be complete and would not function properly.

Option Analysis:

Option A: WAN and LAN are types of networks, not the fundamental components required for data communications.
Option B: Hardware and software are the essential components needed for data communications to occur.
Option C: Full duplex and half duplex refer to communication modes, not the fundamental components required for data communications.
Option D: While WAN, LAN, full duplex, and half duplex are related to data communications, they are not the fundamental components required for data communications to occur.

100. TCP assigns a sequence number to each segment that is being sent. The sequence number for each segment is the number of the..... byte carried in that segment.

Correct Answer: Correct answer is: (A) First.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Easy

Concept notes: In TCP, each segment is assigned a sequence number that corresponds to the first byte of data in that segment.

Common Mistakes: Students often confuse the sequence number with the last byte of the segment, but it is actually the first byte.

Explanations: TCP assigns a sequence number to each segment that represents the number of the first byte carried in that segment. This ensures that the receiver can correctly order the segments and identify any missing data.

Option Analysis:

Option A: Correct. The sequence number is assigned to the first byte of the segment.
Option B: Incorrect. The sequence number is not assigned to the last byte of the segment.
Option C: Incorrect. The sequence number is not assigned to the middle byte of the segment.
Option D: Incorrect. The sequence number is assigned to the first byte of the segment.

Mnemonic: First Byte, First Sequence

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Computer networking MCQ - Set 10

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