Computer networking MCQ – Change your future

391. Communication system is a combination of

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

Exam Relevance: GATE, ECE, EE

Difficulty: Easy

Concept notes: A communication system is a combination of hardware, software, and data transfer links.

Common Mistakes: Students may overlook the importance of software and data transfer links, focusing only on hardware.

Explanations: A communication system requires hardware components such as transmitters, receivers, and antennas. It also needs software for encoding, decoding, and error correction. Data transfer links are essential for transmitting information between different parts of the system. Therefore, all these elements are necessary for a complete communication system.

Option Analysis:

Option A: Hardware is a crucial part of a communication system, but it is not the only component.
Option B: Software is necessary for processing and managing the data in a communication system, but it is not the only component.
Option C: Data transfer links are essential for the transmission of information, but they are not the only component.
Option D: All of the above correctly identifies that a communication system is a combination of hardware, software, and data transfer links.

392. Large amounts of data sent across the internet are split into smaller units. What is the name of these smaller units of data?

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

Exam Relevance: AP Computer Science Principles, A+ Certification, CompTIA Network+

Difficulty: Easy

Concept notes: Data sent across the internet is divided into smaller units called packets. This division allows for efficient transmission and routing of data over networks.

Common Mistakes: Students may confuse packets with other terms like "parcels" or "packages," which are not technical terms used in data transmission.

Explanations: Data packets are the fundamental units of data transmission in computer networks. They are used to break down large amounts of data into manageable pieces that can be sent over the internet. Each packet contains a portion of the original data along with header information that includes source and destination addresses, sequence numbers, and other control information. This ensures that the data can be reassembled correctly at the destination.

Option Analysis:

Option A: Letters are not a technical term used in data transmission.
Option B: Parcels are not a technical term used in data transmission.
Option C: Packages are not a technical term used in data transmission.
Option D: Packets are the correct term for the smaller units of data sent across the internet.

Mnemonic: Packets are like "Packets of data" - think of them as small, manageable data containers.

393. In....., each packet of a message need not follow the same path from sender to receiver.

Correct Answer: Correct answer is: (D) Datagram approach to packet switching.

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Moderate

Concept notes: In the datagram approach to packet switching, each packet of a message can take a different path from the sender to the receiver.

Common Mistakes: Students may confuse the datagram approach with the virtual circuit approach, where packets follow the same path.

Explanations: In the datagram approach to packet switching, each packet is treated independently and can take a different route to reach the destination. This contrasts with other methods like circuit switching or virtual circuit packet switching, where packets follow a predetermined path. The datagram approach allows for flexibility and can handle network congestion better by routing packets through less congested paths.

Option Analysis:

Option A: Circuit switching involves establishing a dedicated path for the entire duration of the communication, which is not applicable here.
Option B: Message switching involves sending the entire message as a single unit, which does not align with the concept of packets taking different paths.
Option C: Virtual circuit approach to packet switching involves setting up a path for packets to follow, which is different from the datagram approach.
Option D: Datagram approach to packet switching allows each packet to take a different path, which is the correct answer.

Mnemonic: Datagram = Different Paths

394. To register, organization needs to give name ofits server and IP address of

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: To register an organization's server, the name and IP address of the server are required.

Common Mistakes: Students may mistakenly believe that the IP addresses of clients or zones are also required for registration.

Explanations: The registration process for an organization's server typically requires the name and IP address of the server itself. This information is crucial for identifying and locating the server within the network. The IP address uniquely identifies the server on the network, while the name provides a human-readable identifier. Clients and zones are not directly involved in the server registration process.

Option Analysis:

Option A: Correct. The server's name and IP address are required for registration.
Option B: Incorrect. The IP addresses of clients are not required for server registration.
Option C: Incorrect. The zones are not directly involved in the server registration process.
Option D: Incorrect. Only the server's information is required, not all of the above.

395. A T-switch is used to

Correct Answer: Correct answer is: (D) Rearrange the connections between computing equipment.

Exam Relevance: Computer Networks, Telecommunications, Data Communications

Difficulty: Moderate

Concept notes: A T-switch is a type of switch used in telecommunications and computer networking to rearrange the connections between different pieces of computing equipment.

Common Mistakes: Students may confuse the function of a T-switch with other types of switches or devices that control data flow or transmission, rather than focusing on its primary function of rearranging connections.

Explanations: A T-switch, also known as a time switch, is used in crossbar switching systems to rearrange the connections between different pieces of computing equipment. This allows for dynamic reconfiguration of the network, enabling efficient data routing and switching. The T-switch does not control how messages are passed, echo characters, or transmit characters one at a time. Its primary function is to manage and rearrange the connections between devices.

Option Analysis:

Option A: This option is incorrect because a T-switch does not control how messages are passed between computers. That function is typically handled by routers or other network devices.
Option B: This option is incorrect because echoing characters is a function of a device like a terminal or a modem, not a T-switch.
Option C: This option is incorrect because transmitting characters one at a time is a function of serial communication protocols, not a T-switch.
Option D: This option is correct because a T-switch is specifically designed to rearrange the connections between computing equipment.

Mnemonic: T for Time, T for Toggle

396. Radio waves are

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

Exam Relevance: GATE, GRE, ECE exams

Difficulty: Easy

Concept notes: Radio waves are waves that propagate in all directions from the source, unless focused or directed by an antenna.

Common Mistakes: Students may confuse radio waves with directional waves, which are guided or focused in a specific direction.

Explanations: Radio waves are omnidirectional because they spread out in all directions from the source, similar to how light from a lamp illuminates a room in all directions. This property is due to the nature of electromagnetic waves, which naturally propagate spherically outward from the point of emission.

Option Analysis:

Option A: Unidirectional waves travel in one direction only, which is not the case for radio waves.
Option B: Omnidirectional waves spread out in all directions, which is the correct property of radio waves.
Option C: Bidirectional waves travel in two specific directions, which does not apply to radio waves.
Option D: Directional waves are focused in a specific direction, which is not the natural propagation of radio waves.

Mnemonic: Radio waves spread like a lamp's light.

397. ..... is a first-generation cellular phone system.

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

Exam Relevance: Wireless Communications, Telecommunications Engineering, Network Systems

Difficulty: Easy

Concept notes: AMPS stands for Advanced Mobile Phone System, which was one of the first cellular phone systems used in the United States.

Common Mistakes: Students may confuse AMPS with D-AMPS or GSM, which are later generations of cellular systems.

Explanations: AMPS is a first-generation (1G) cellular phone system that was widely used in the United States before the advent of digital systems. It was an analog system that provided basic voice services. D-AMPS and GSM are second-generation (2G) systems that introduced digital technology and improved features over AMPS.

Option Analysis:

Option A: AMPS is correct as it is a first-generation cellular phone system.
Option B: D-AMPS is incorrect as it is a second-generation system.
Option C: GSM is incorrect as it is also a second-generation system.
Option D: None of the above is incorrect as AMPS is a valid first-generation system.

Mnemonic: A for AMPS, Analog for 1G

398. The most common protocol for point-to-point access is the Point-to-Point Protocol (PPP), which is a.....protocol.

Correct Answer: Correct answer is: (B) Byte-oriented.

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

Difficulty: Easy

Concept notes: The Point-to-Point Protocol (PPP) is a data link layer protocol used for transporting network layer protocols over point-to-point links. It is designed to be byte-oriented, meaning it processes data in bytes rather than bits or characters.

Common Mistakes: Students may confuse PPP with other protocols that are bit-oriented or character-oriented, leading to incorrect selection of options A or C.

Explanations: PPP is byte-oriented because it processes data in 8-bit bytes. This allows for efficient and reliable transmission of data over serial links. The byte-oriented nature of PPP ensures that data is transmitted in a consistent and predictable manner, which is crucial for maintaining the integrity of the data being transmitted.

Option Analysis:

Option A: Incorrect because PPP is not bit-oriented. Bit-oriented protocols process data at the bit level, which is not the case for PPP.
Option B: Correct because PPP processes data in 8-bit bytes, making it byte-oriented.
Option C: Incorrect because PPP is not character-oriented. Character-oriented protocols process data based on specific character codes, which is not the case for PPP.
Option D: Incorrect because the correct answer is explicitly provided as byte-oriented.

399. Must connect to Internet and disconnect when done .

Correct Answer: Correct answer is: (A) Dial-up.

Exam Relevance: IT Essentials, Networking Fundamentals

Difficulty: Easy

Concept notes: Dial-up internet requires a phone line and connects to the internet through a modem. It must connect to the internet and disconnect when done.

Common Mistakes: Students may confuse dial-up with other internet connection types that do not require manual connection and disconnection.

Explanations: Dial-up internet requires a phone line and connects to the internet through a modem. When a user wants to access the internet, they must manually connect the dial-up modem to the internet service provider. Once the session is complete, the user must manually disconnect the connection. This process of connecting and disconnecting is unique to dial-up internet.

Option Analysis:

Option A: Dial-up requires manual connection and disconnection, fitting the requirement of the question.
Option B: DSL (Digital Subscriber Line) provides a constant connection and does not require manual disconnection.
Option C: Fiber-optic internet provides a constant connection and does not require manual disconnection.
Option D: Satellite internet provides a constant connection and does not require manual disconnection.

Mnemonic: Dial-up: Dial, Connect, Disconnect

400. User access devices in Asynchronous Transfer Mode (ATM) is known as

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

Exam Relevance: Computer Networks, Data Communication, Network Engineering

Difficulty: Easy

Concept notes: In Asynchronous Transfer Mode (ATM), user access devices are referred to as endpoints.

Common Mistakes: Students may confuse endpoints with other network components such as nodes or virtual points.

Explanations: Endpoints in ATM are the devices that initiate and terminate communication. They are the user access devices that connect to the ATM network. The term "endpoints" is used to denote the devices at the ends of a communication link, which are responsible for sending and receiving data.

Option Analysis:

Option A: Correct. Endpoints are the user access devices in ATM.
Option B: Incorrect. Virtual Points is not a standard term for user access devices in ATM.
Option C: Incorrect. Nodes refer to any device connected to a network, not specifically user access devices in ATM.
Option D: Incorrect. Transmitting points is not a standard term for user access devices in ATM.

Mnemonic: E for Endpoints, E for Entry and Exit in ATM.

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Computer networking MCQ - Set 40

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