Computer networking MCQ – Change your future

61. ..... means combining several streams of traffic into one stream.

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

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: Mixing refers to the process of combining multiple streams of traffic into a single stream.

Common Mistakes: Students may confuse mixing with translation, which involves converting data from one format to another.

Explanations: Mixing is the correct term for combining several streams of traffic into one stream. This concept is often used in networking and data transmission contexts where multiple data streams are combined for efficient transmission.

Option Analysis:

Option A: Translation involves converting data from one format to another, not combining streams.
Option B: Mixing is the correct term for combining multiple streams into one.
Option C: Both a and b is incorrect as only mixing is the correct term for combining streams.
Option D: None of the above is incorrect as mixing is the correct term.

62. A Transmission Path (TP) is physical connection between an endpoint and a

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

Exam Relevance: Networking Fundamentals, Telecommunications Exams, CCNA, CompTIA Network+

Difficulty: Moderate

Concept notes: A Transmission Path (TP) is a physical connection that links an endpoint to a switch in a telecommunications network.

Common Mistakes: Students may confuse the role of a switch with that of a node or cell, which are different components in a network.

Explanations: In telecommunications, a Transmission Path (TP) is a physical connection that directly links an endpoint to a switch. The switch is a critical component that routes data between different endpoints. Nodes and cells are not specific to the physical connection between an endpoint and a switch, and users are not physical components of the network.

Option Analysis:

Option A: A node is a point in a network where data can be created, received, or transmitted, but it is not specifically the physical connection to an endpoint.
Option B: A cell is a unit of data in a network, but it does not represent a physical connection.
Option C: A switch is the correct answer as it is the component that the endpoint is physically connected to via a Transmission Path (TP).
Option D: A user is an entity that interacts with the network, but not a physical component of the network.

Mnemonic: TP to Switch, not to User or Node.

63. Frame Relay was originally designed to provide

Correct Answer: Correct answer is: (B) PVC Connection.

Exam Relevance: CCNA, Network+, CompTIA Network+

Difficulty: Moderate

Concept notes: Frame Relay is a data link layer protocol that was designed to efficiently carry data traffic across a network. It uses Permanent Virtual Circuits (PVCs) to establish a dedicated path for data transmission between two points.

Common Mistakes: Students may confuse Frame Relay with other connection-oriented protocols like X.25, which also uses virtual circuits but operates differently.

Explanations: Frame Relay was originally designed to provide PVC connections, which are pre-established and dedicated paths for data transmission. PVCs allow for efficient and reliable data transfer without the overhead of setting up and tearing down connections for each data transfer session.

Option Analysis:

Option A: VOFR Connection is not the original design purpose of Frame Relay. VOFR (Voice over Frame Relay) is a later application of Frame Relay technology.
Option B: PVC Connection is correct as Frame Relay was designed to provide these pre-established, dedicated paths for data transmission.
Option C: Protocol Connections is too broad and does not specifically refer to the original design purpose of Frame Relay.
Option D: Data Connections is a general term and does not specifically refer to the PVCs that Frame Relay was designed to provide.

Mnemonic: PVC: Permanent, Pre-established, Path

64. Multicast link state routing uses the..... tree approach.

Correct Answer: Correct answer is: (A) Source-based.

Exam Relevance: CCNA, CCNP, Network+

Difficulty: Moderate

Concept notes: Multicast link state routing uses a source-based tree approach to distribute data to multiple receivers.

Common Mistakes: Students may confuse multicast link state routing with other routing protocols that use group-shared trees.

Explanations: Multicast link state routing employs a source-based tree approach, where the source node is the root of the tree. This means that the source node is responsible for determining the paths to all the receivers. The source-based tree ensures that the data is efficiently distributed from the source to all the receivers, optimizing the use of network resources.

Option Analysis:

Option A: Correct. Multicast link state routing uses a source-based tree approach.
Option B: Incorrect. Group-shared trees are not used in multicast link state routing.
Option C: Incorrect. The correct approach is source-based, not either option.
Option D: Incorrect. The correct approach is source-based, not none of the above.

65. What is the interface that allow web servers to talk to back end programs and scripts that can accept input and generate HTML pages in response?

Correct Answer: Correct answer is: (B) Common gateway interface.

Exam Relevance: CISSP, CompTIA Security+, Network+

Difficulty: Easy

Concept notes: The Common Gateway Interface (CGI) is a standard for interfacing external applications with servers to handle web requests and generate dynamic content.

Common Mistakes: Students may confuse CGI with other gateway interfaces or protocols, such as API or RPC, which serve different purposes.

Explanations: The Common Gateway Interface (CGI) is the standard interface that allows web servers to communicate with external programs or scripts. These programs can process input and generate HTML pages in response. CGI is specifically designed for this purpose, making it the correct answer.

Option Analysis:

Option A: Interior gateway interface is not related to web servers and is used in routing protocols within a network.
Option B: Common gateway interface is the correct answer as it is the standard for web servers to interact with external programs.
Option C: Exterior gateway interface is used for routing between different networks and is not related to web servers.
Option D: This option is incorrect as the correct answer is provided in option B.

66. When propagation speed is multiplied by propagation time, we get the.....

Correct Answer: Correct answer is: (D) Distance a signal or bit has traveled.

Exam Relevance: Electrical Engineering, Computer Science, Physics

Difficulty: Easy

Concept notes: The propagation speed of a signal is the speed at which the signal travels through a medium. When this speed is multiplied by the time it takes for the signal to travel, the result is the distance the signal has traveled.

Common Mistakes: Students may confuse propagation speed with other signal characteristics, such as frequency or wavelength, leading to incorrect answers.

Explanations: Propagation speed is the velocity at which a signal moves through a medium. Propagation time is the duration it takes for the signal to travel from one point to another. Multiplying these two values gives the distance the signal has traveled, as distance = speed × time.

Option Analysis:

Option A: Throughput is the amount of data that can be transmitted over a given period and is not related to the distance a signal travels.
Option B: Wavelength is the distance between successive crests of a wave and is not related to the distance a signal travels over time.
Option C: Distortion factor refers to the alteration of a signal's shape and is not related to the distance a signal travels.
Option D: Distance a signal or bit has traveled is the correct answer as it is the product of propagation speed and propagation time.

Mnemonic: Speed times time equals distance, think "Speedy Time = Distance Traveled."

67. Which is not the data flow of communication?

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

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

Difficulty: Easy

Concept notes: In communication systems, data flow refers to the direction in which data can be transmitted. The options provided describe different types of data flow: Simplex, Half-duplex, and Full-duplex. Duplex is not a specific term used to describe data flow in communication systems.

Common Mistakes: Students may confuse "duplex" with "full-duplex," as both terms involve two-way communication. However, "duplex" is a general term and not a specific data flow type.

Explanations: Simplex communication allows data to flow in only one direction. Half-duplex communication allows data to flow in both directions but not simultaneously. Full-duplex communication allows data to flow in both directions simultaneously. Duplex is a general term that refers to two-way communication but is not a specific data flow type in communication systems.

Option Analysis:

Option A: Simplex is a valid data flow type where communication is unidirectional.
Option B: Half-duplex is a valid data flow type where communication is bidirectional but not simultaneous.
Option C: Duplex is not a specific data flow type in communication systems; it is a general term for two-way communication.
Option D: Full-duplex is a valid data flow type where communication is bidirectional and simultaneous.

Mnemonic: S-H-F: Simplex, Half-duplex, Full-duplex

68. Token bucket allows bursty traffic to regulated at

Correct Answer: Correct answer is: (A) Maximum rate.

Exam Relevance: Networking exams, Computer Science exams, Telecommunications exams

Difficulty: Moderate

Concept notes: Token bucket is a traffic shaping mechanism that allows bursty traffic to be regulated at a maximum rate.

Common Mistakes: Students may confuse the token bucket mechanism with rate limiting, which regulates traffic at a constant rate.

Explanations: Token bucket allows traffic bursts to be regulated at a maximum rate. This means that the token bucket mechanism can handle short bursts of traffic above the average rate, but it ensures that the long-term average rate does not exceed the maximum rate. This is why the correct answer is the maximum rate.

Option Analysis:

Option A: Correct. Token bucket regulates traffic at a maximum rate, allowing for bursts above the average rate.
Option B: Incorrect. Token bucket does not regulate traffic at a minimum rate.
Option C: Incorrect. Token bucket does not regulate traffic at a 0 rate.
Option D: Incorrect. Token bucket does not regulate traffic at a constant rate.

69. A virtual local area network (VLAN) is configured by.....

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

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: A virtual local area network (VLAN) is a logical network that is configured through software, not physical wiring or hardware.

Common Mistakes: Students may mistakenly believe that VLANs are configured through physical wiring or hardware, as they are tangible and visible.

Explanations: A VLAN is a logical segmentation of a network that is configured through software. This allows network administrators to group devices together based on department, function, or other criteria, without needing to physically rewire the network. VLANs are managed and configured using software tools and protocols, making the correct answer software.

Option Analysis:

Option A: Correct. VLANs are configured through software.
Option B: Incorrect. VLANs are not configured through physical wiring.
Option C: Incorrect. VLANs are not configured through hardware.
Option D: Incorrect. The correct answer is software.

70. Which routing protocol implements the diffusing update algorithm?

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

Exam Relevance: CCNA, CCNP, JNCIA, JNCIS

Difficulty: Moderate

Concept notes: EIGRP (Enhanced Interior Gateway Routing Protocol) implements the diffusing update algorithm (DUAL) for its routing decisions.

Common Mistakes: Students may confuse EIGRP with other IGP (Interior Gateway Protocol) routing protocols like OSPF or IS-IS, which use different algorithms.

Explanations: EIGRP uses the diffusing update algorithm (DUAL) to calculate the best path to a destination. DUAL ensures loop-free operation by maintaining a feasible successor for each destination, which is an alternative path that can be used if the primary path fails. This algorithm is unique to EIGRP and distinguishes it from other routing protocols.

Option Analysis:

Option A: IS-IS does not use DUAL; it uses the SPF (Shortest Path First) algorithm.
Option B: IGRP is the predecessor to EIGRP and does not use DUAL; it uses a distance vector algorithm.
Option C: EIGRP uses the diffusing update algorithm (DUAL) for its routing decisions.
Option D: OSPF uses the SPF (Shortest Path First) algorithm, not DUAL.

Mnemonic: EIGRP DUAL: "EIGRP Does Use Loop Avoidance"

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Computer networking MCQ - Set 7

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