Computer networking MCQ – Change your future

771. A bridge has access to which address of a station on the same network?

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

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

Difficulty: Easy

Concept notes: A bridge operates at the data link layer of the OSI model and uses physical (MAC) addresses to forward frames between different segments of a network.

Common Mistakes: Students may confuse the function of a bridge with that of a router, which operates at the network layer and uses network addresses.

Explanations: A bridge uses physical (MAC) addresses to determine the destination of a frame. It does not use network addresses or service access points. Therefore, the correct answer is the physical address.

Option Analysis:

Option A: Correct. Bridges use physical (MAC) addresses to forward frames.
Option B: Incorrect. Network addresses are used by routers, not bridges.
Option C: Incorrect. Service access points are not used by bridges for frame forwarding.
Option D: Incorrect. Bridges only use physical addresses, not all of the listed options.

Mnemonic: Bridge MAC, not IP or SAP.

772. Ping program sends messages with sequence numbers starting from

Correct Answer: Correct answer is: (D) 0.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Very Easy

Concept notes: The ping program sends messages with sequence numbers starting from 0.

Common Mistakes: Students may mistakenly believe that sequence numbers start from 1, as this is a common convention in many other contexts.

Explanations: The ping program uses sequence numbers to track the order of sent and received packets. By convention, these sequence numbers start from 0, not 1. This is a standard implementation detail of the ping utility.

Option Analysis:

Option A: Incorrect, as sequence numbers do not start from -1.
Option B: Incorrect, as sequence numbers do not start from 1.
Option C: Incorrect, as sequence numbers do not start from 2.
Option D: Correct, as sequence numbers start from 0.

773. Device needed to allow home computers to connect to the internet is called

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A modem is a device that enables a home computer to connect to the internet by converting digital signals into analog signals and vice versa.

Common Mistakes: Students may confuse a modem with a router or gateway, which are different devices that perform different functions in a network.

Explanations: A modem is necessary to connect a home computer to the internet because it converts the digital data from the computer into a format that can be transmitted over telephone lines or cable networks. This conversion is essential for the data to travel through the internet infrastructure and reach its destination.

Option Analysis:

Option A: Correct. A modem is the device that allows a home computer to connect to the internet by converting digital signals into analog signals and vice versa.
Option B: Incorrect. A gateway is a device that connects two different networks, but it is not the primary device for connecting a home computer to the internet.
Option C: Incorrect. A monitor is a display device and does not facilitate internet connectivity.
Option D: Incorrect. A peripheral is a general term for any device that can be connected to a computer, but it does not specifically refer to a device that connects a computer to the internet.

Mnemonic: Modem: Modulate-Demodulate

774. What is the address range of a Class B network address in binary?

Correct Answer: Correct answer is: (C) 10xxxxxx.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: Class B network addresses are identified by the first two bits of the first octet being set to 10.

Common Mistakes: Students may confuse the bit pattern for Class B with that of Class A or Class C.

Explanations: In the context of IP addressing, Class B addresses are defined by the first two bits of the first octet being set to 10. This means the binary representation starts with 10xxxxxx, where the x's can be either 0 or 1. This pattern uniquely identifies a Class B network address.

Option Analysis:

Option A: This pattern (01xxxxxx) is incorrect for Class B addresses; it is actually the pattern for Class A addresses.
Option B: This pattern (0xxxxxxx) is incorrect; it does not match any standard classful addressing scheme.
Option C: This pattern (10xxxxxx) is correct for Class B addresses.
Option D: This pattern (110xxxxx) is incorrect; it does not match any standard classful addressing scheme.

775. ..... is just a connector.

Correct Answer: Correct answer is: (B) A passive hub.

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Easy

Concept notes: A passive hub is a simple device that connects multiple devices on a network and does not perform any data processing or amplification.

Common Mistakes: Students may confuse passive hubs with active hubs, which do perform some level of data processing and amplification.

Explanations: A passive hub is just a connector because it does not amplify or process the data signals passing through it. It simply forwards the signals to all connected devices without any modification. This makes it a simple device that merely connects network devices.

Option Analysis:

Option A: An active hub performs data processing and amplification, making it more than just a connector.
Option B: A passive hub is just a connector, as it does not process or amplify data signals.
Option C: This option is incorrect because only a passive hub is just a connector.
Option D: This option is incorrect because a passive hub is indeed just a connector.

Mnemonic: Passive = Plain Connector

776. ..... is the capacity of a wired or wireless network communications link to transmit the maximum amount of data from one point to another over a computer network

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

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Moderate

Concept notes: Bandwidth refers to the maximum amount of data that can be transmitted over a network in a given time period.

Common Mistakes: Students may confuse bandwidth with latency, which is the delay before a transfer of data begins following an instruction for its transfer.

Explanations: Bandwidth is the capacity of a network to transmit data from one point to another. It is measured in bits per second (bps) and indicates the maximum data transfer rate. This makes it the correct answer as it directly relates to the maximum amount of data that can be transmitted over a network.

Option Analysis:

Option A: Latency refers to the delay before a transfer of data begins following an instruction for its transfer, not the capacity to transmit data.
Option B: Bandwidth is the correct term for the capacity of a network to transmit data.
Option C: Gigabytes is a unit of data storage, not a measure of network capacity.
Option D: Range refers to the physical distance over which a network can operate, not the capacity to transmit data.

777. An association in Stream Control Transmission Protocol (SCTP), can involve

Correct Answer: Correct answer is: (B) Multiple Stream.

Exam Relevance: Networks, Computer Networks, Data Communication

Difficulty: Moderate

Concept notes: In SCTP, an association can involve multiple streams to handle multiple data flows between endpoints.

Common Mistakes: Students may mistakenly believe that SCTP only supports a single stream per association.

Explanations: SCTP is designed to support multiple streams within a single association. This allows for the separation of data flows, improving efficiency and reliability. Each stream can operate independently, which means that if one stream encounters an issue, it does not affect the others. This feature is crucial for applications that require multiple data flows, such as multimedia streaming or web browsing.

Option Analysis:

Option A: Incorrect, as SCTP supports multiple streams, not just a single stream.
Option B: Correct, SCTP supports multiple streams within a single association.
Option C: Incorrect, SCTP does not define a concept of "double-level stream."
Option D: Incorrect, "Oriented Stream" is not a defined term in SCTP.

778. Network protocols are?

Correct Answer: Correct answer is: (A) Agreements on how communication components and DTE's are to communicate.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: Network protocols are formalized agreements that define the rules and procedures for communication between different network components and devices (DTEs).

Common Mistakes: Students may confuse network protocols with physical or logical communication channels, which are different aspects of network communication.

Explanations: Network protocols are essential for ensuring that different devices and components in a network can communicate effectively. They specify the format, timing, and sequence of messages exchanged between devices. This ensures that data is transmitted and received correctly, regardless of the underlying hardware or software differences. Therefore, the correct answer is that network protocols are agreements on how communication components and DTEs are to communicate.

Option Analysis:

Option A: Correct. Network protocols are indeed agreements on how communication components and DTEs are to communicate.
Option B: Incorrect. Logical communication channels are not the same as network protocols; they are a part of the network architecture.
Option C: Incorrect. Physical communication channels are the actual media used to transfer data, not the protocols that govern communication.
Option D: Incorrect. This option is not applicable as the correct answer is provided in option A.

779. What are the data transmission channels available for carrying data from one location to another?

Correct Answer: Correct answer is: (D) All of the above.

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

Difficulty: Moderate

Concept notes: Data transmission channels refer to the various methods and technologies used to transfer data from one location to another. These include narrowband, voiceband, and broadband channels.

Common Mistakes: Students may mistakenly believe that only one type of channel is used for data transmission, overlooking the variety of available options.

Explanations: Narrowband channels are used for low-speed data transmission, typically in the range of a few kilobits per second. Voiceband channels are designed for voice communication but can also carry data at low speeds, typically up to 56 kbps. Broadband channels support high-speed data transmission, often in the range of megabits per second. Since all these channels are used for data transmission, the correct answer is "All of the above."

Option Analysis:

Option A: Narrowband channels are indeed used for data transmission, but they are not the only option.
Option B: Voiceband channels are also used for data transmission, but they are not the only option.
Option C: Broadband channels are used for high-speed data transmission, but they are not the only option.
Option D: This option correctly identifies that all the mentioned channels are used for data transmission.

Mnemonic: N-V-B: Narrowband, Voiceband, Broadband

780. A television broadcast is an example of..... transmission.

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

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

Difficulty: Easy

Concept notes: Simplex transmission allows data to flow in only one direction at a time.

Common Mistakes: Students may confuse simplex with half-duplex, which allows two-way communication but not simultaneously.

Explanations: A television broadcast is an example of simplex transmission because the data (the broadcast signal) flows from the broadcaster to the viewer in one direction only. There is no simultaneous two-way communication.

Option Analysis:

Option A: Simplex transmission is correct because the broadcast signal flows in one direction only.
Option B: Half-duplex transmission allows two-way communication but not simultaneously, which does not apply to a television broadcast.
Option C: Full-duplex transmission allows simultaneous two-way communication, which is not applicable to a television broadcast.
Option D: Automatic transmission is not a relevant term in this context.

Mnemonic: S - Simplex, Single direction

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Computer networking MCQ - Set 78

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