Computer networking MCQ – Change your future

71. The first operational computer network in the world was the..... for the United States Department of Defense.

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

Exam Relevance: Computer Science, Information Technology, Networking Exams

Difficulty: Easy

Concept notes: ARPANET was the first operational computer network in the world, developed for the United States Department of Defense.

Common Mistakes: Students may confuse ARPANET with other early networks or modern internet concepts.

Explanations: ARPANET was the first operational computer network, established in 1969 by the United States Department of Defense's Advanced Research Projects Agency (ARPA). It was designed to allow multiple computers to communicate with each other and share resources, laying the foundation for modern computer networking and the internet.

Option Analysis:

Option A: ARPANET is the correct answer as it was the first operational computer network.
Option B: ERNET is not the correct answer; it was an early Indian academic network.
Option C: SKYNET is not the correct answer; it is a fictional network from the "Terminator" film series.
Option D: DARPANET is not the correct answer; ARPANET was the actual name of the network, not DARPANET.

Mnemonic: A for ARPANET, Advanced Research Projects Agency Network.

72. Bus, ring and star topologies are mostly used in the

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

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Easy

Concept notes: Local Area Networks (LANs) are typically used for connecting devices within a limited geographical area, such as a single building or a group of buildings. Bus, ring, and star topologies are common network configurations used in LANs due to their suitability for small to medium-sized networks.

Common Mistakes: Students may confuse LAN topologies with those used in MANs (Metropolitan Area Networks) or WANs (Wide Area Networks), which often use different topologies such as mesh or hybrid configurations.

Explanations: Bus, ring, and star topologies are primarily used in LANs because they are efficient for connecting devices within a small area. Bus topology uses a single cable to connect all devices, ring topology connects devices in a circular loop, and star topology connects all devices to a central hub. These configurations are well-suited for the scale and requirements of LANs, which typically involve a smaller number of devices and shorter distances compared to MANs and WANs.

Option Analysis:

Option A: Correct. Bus, ring, and star topologies are commonly used in LANs.
Option B: Incorrect. MANs typically use more complex topologies like mesh or hybrid configurations.
Option C: Incorrect. WANs often use mesh or hybrid topologies to connect geographically dispersed networks.
Option D: Incorrect. Internetworks are broader and often use a combination of different topologies, including those used in LANs, MANs, and WANs.

73. WAIS stands for

Correct Answer: Correct answer is: (D) Wide Area Information Service.

Exam Relevance: GRE, GMAT, CCNA, CISSP

Difficulty: Very Easy

Concept notes: WAIS stands for Wide Area Information Service, which is a protocol used for distributed information services.

Common Mistakes: Students may confuse WAIS with other acronyms that have similar meanings or initial letters.

Explanations: WAIS is a protocol designed to provide distributed information services over a wide area network. It is used for searching and retrieving information from multiple databases across the internet. The acronym stands for Wide Area Information Service, making option D the correct answer.

Option Analysis:

Option A: Wide Area Intellectual Service is incorrect as it does not align with the established acronym for WAIS.
Option B: Web Access Information system is incorrect as it does not match the correct acronym for WAIS.
Option C: World wide Application of Intelligent System is incorrect as it does not correspond to the correct acronym for WAIS.
Option D: Wide Area Information Service is the correct acronym for WAIS.

74. In a switch pipeline, a single packet header indicates how to process all of the internal data path physical transfer units also known as

Correct Answer: Correct answer is: (D) Phits.

Exam Relevance: Computer Networks, Data Communications, Network Engineering

Difficulty: Moderate

Concept notes: In a switch pipeline, a single packet header is used to process all internal data path physical transfer units, known as Phits.

Common Mistakes: Students may confuse Phits with other data transfer units or terms like blocks, tailer, or header, which are not specific to the internal data path processing in switch pipelines.

Explanations: In switch pipelines, the internal data path physical transfer units are referred to as Phits. These Phits are processed based on the information provided in the packet header. The packet header contains the necessary instructions to handle each Phit as it moves through the pipeline stages. This ensures that the entire packet is processed consistently and efficiently.

Option Analysis:

Option A: Blocks are not specific to the internal data path processing in switch pipelines.
Option B: Tailer is not a term used in this context; it may be confused with the packet trailer, which is different from the internal data path units.
Option C: Header refers to the packet header itself, not the internal data path units.
Option D: Phits are the correct term for the internal data path physical transfer units in switch pipelines.

75. International large companies have set up of mainframe computers in different countries is an example of

Correct Answer: Correct answer is: (C) Wide area network.

Exam Relevance: Networking Fundamentals, CCNA, CISSP

Difficulty: Moderate

Concept notes: A wide area network (WAN) connects computers and other network devices over large geographical areas, such as different countries.

Common Mistakes: Students may confuse WAN with LAN (Local Area Network), which covers a smaller geographical area like a single building or campus.

Explanations: International large companies setting up mainframe computers in different countries is an example of a wide area network (WAN). WANs are designed to connect devices over large geographical distances, which aligns with the scenario of mainframe computers being distributed across multiple countries.

Option Analysis:

Option A: Connected area network is not a standard term in networking.
Option B: Timed area network is not a standard term in networking.
Option C: Wide area network (WAN) is the correct term for connecting devices over large geographical areas.
Option D: Terminal area network is not a standard term in networking.

Mnemonic: WAN - Wide Across Nations

76. Which of the following protocol assign IP's dynamically to hosts available on the network?

Correct Answer: Correct answer is: (B) DHCP.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: DHCP (Dynamic Host Configuration Protocol) is a network protocol used to automatically assign IP addresses to devices on a network.

Common Mistakes: Students may confuse DHCP with other acronyms that sound similar, such as DHCPS, DHXP, or DHHP.

Explanations: DHCP is the correct protocol for dynamically assigning IP addresses to hosts on a network. It simplifies network administration by automating the process of IP address assignment, reducing the need for manual configuration.

Option Analysis:

Option A: DHCPS is not a valid protocol for IP address assignment.
Option B: DHCP is the correct protocol for dynamically assigning IP addresses to hosts on a network.
Option C: DHXP is not a valid protocol for IP address assignment.
Option D: DHHP is not a valid protocol for IP address assignment.

77. Analog data refers to information that is

Correct Answer: Correct answer is: (B) Continuous state.

Exam Relevance: EE, CE, CS, ECE

Difficulty: Easy

Concept notes: Analog data represents information that can take on any value within a range, making it continuous.

Common Mistakes: Students may confuse analog data with digital data, which is discrete.

Explanations: Analog data is characterized by its continuous nature, meaning it can vary smoothly and take on any value within a given range. This is in contrast to digital data, which is discrete and can only take on specific, distinct values.

Option Analysis:

Option A: Discrete state is incorrect because analog data is not limited to specific, distinct values.
Option B: Continuous state is correct because analog data can vary smoothly and take on any value within a range.
Option C: Randomly arranged is incorrect because analog data does not imply randomness; it simply varies continuously.
Option D: None of Above is incorrect because the correct description is provided in option B.

Mnemonic: A: Always Continuous

78. A network device used to regenerate or replicate a signal. Used in transmission systems to regenerate analog or digital signals distorted by transmission loss.

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

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

Difficulty: Easy

Concept notes: A repeater is a device used in network transmission systems to regenerate or replicate a signal that has been distorted by transmission loss.

Common Mistakes: Students may confuse a repeater with a router, which is used for directing data traffic between different networks, not for signal regeneration.

Explanations: A repeater is specifically designed to regenerate or replicate a signal that has been distorted by transmission loss. This ensures that the signal can travel further without degradation. Repeaters are commonly used in both analog and digital transmission systems to maintain signal integrity over long distances.

Option Analysis:

Option A: Correct. A repeater is used to regenerate or replicate a signal distorted by transmission loss.
Option B: Incorrect. A duplicator is not a standard network device and does not have the function of regenerating signals.
Option C: Incorrect. A router is used for directing data traffic between different networks, not for signal regeneration.
Option D: Incorrect. An extender may be used to extend the range of a signal, but it does not regenerate the signal in the same way a repeater does.

Mnemonic: R for Repeater, R for Regenerate.

79. The inclusion of the checksum in the TCP segment is.....

Correct Answer: Correct answer is: (B) Mandatory.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Moderate

Concept notes: The checksum in a TCP segment is a mandatory field used for error detection.

Common Mistakes: Students may mistakenly believe that the checksum is optional or can be omitted in certain scenarios.

Explanations: The checksum in a TCP segment is a mandatory field that ensures the integrity of the data being transmitted. It is calculated over the entire TCP segment, including the TCP header and the data payload. The receiver uses the same checksum calculation to verify that the data has not been corrupted during transmission. This makes the checksum an essential part of the TCP protocol for reliable data transmission.

Option Analysis:

Option A: Incorrect, as the checksum is not optional.
Option B: Correct, as the checksum is a mandatory part of the TCP segment.
Option C: Incorrect, as the inclusion of the checksum is not at the discretion of the application program.
Option D: Incorrect, as the correct answer is explicitly stated.

80. In switched 802.3 LANS, each card forms its own..... independents of the others.

Correct Answer: Correct answer is: (D) Collision domain.

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

Difficulty: Moderate

Concept notes: In switched 802.3 LANs, each network interface card (NIC) operates within its own collision domain, which is independent of other collision domains.

Common Mistakes: Students may confuse collision domains with broadcast domains, which are different concepts in networking.

Explanations: In a switched LAN, each port on a switch forms a separate collision domain. This means that each device connected to a switch port can transmit data without interfering with other devices on different ports. This is because switches use store-and-forward technology to prevent collisions between devices on different ports. Therefore, each card in a switched 802.3 LAN forms its own collision domain, independent of the others.

Option Analysis:

Option A: Domain is a general term and does not specifically refer to the independent area where collisions can occur.
Option B: Area is a vague term and does not specifically denote the independent region for collision detection.
Option C: Collision Area is not a standard term in networking; the correct term is Collision Domain.
Option D: Collision domain is the correct term for the independent region where collisions can occur.

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Computer networking MCQ - Set 8

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