Computer networking MCQ

1401. Bit length can be defined in terms of

Correct Answer: Correct answer is: (C) Bit duration.

Exam Relevance: GATE, ECE, EE

Difficulty: Moderate

Concept notes: Bit length is a measure of the time duration of a single bit in a digital signal.

Common Mistakes: Students may confuse bit length with other signal characteristics like frequency or propagation speed.

Explanations: Bit length is directly related to the duration of a single bit in a digital signal. It is the time interval during which a single bit is transmitted. High and low frequency and propagation speed are not directly related to the definition of bit length. Therefore, bit duration is the correct measure of bit length.

Option Analysis:

Option A: High and low frequency are not directly related to the definition of bit length.
Option B: Propagation speed is the speed at which a signal travels through a medium, not a measure of bit length.
Option C: Bit duration is the time interval during which a single bit is transmitted, which is the correct measure of bit length.
Option D: Both b and c are incorrect as propagation speed is not a measure of bit length.

1402. Which network is privately owned and limited to a geographical area?

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

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

Difficulty: Easy

Concept notes: LAN stands for Local Area Network, which is a privately owned network that is limited to a specific geographical area, such as a single building or a group of buildings.

Common Mistakes: Students may confuse LAN with WAN (Wide Area Network), which covers a larger geographical area, or MAN (Metropolitan Area Network), which covers a city or large campus.

Explanations: LAN is a network that is privately owned and limited to a specific geographical area, such as a single building or a group of buildings. This makes it the correct answer as it fits the description of being privately owned and limited to a geographical area.

Option Analysis:

Option A: PAN (Personal Area Network) is a network for personal devices, typically within a person's reach, and is not limited to a geographical area in the same way as LAN.
Option B: WAN (Wide Area Network) covers a large geographical area, such as cities or countries, and is not limited to a specific geographical area like LAN.
Option C: MAN (Metropolitan Area Network) covers a city or large campus, which is larger than the geographical area covered by a LAN.
Option D: LAN (Local Area Network) is a privately owned network limited to a specific geographical area, such as a single building or a group of buildings, making it the correct answer.

Mnemonic: LAN: Local Area Network, Limited Area Network

1403. MAN means

Correct Answer: Correct answer is: (D) Metropolitan Area Network.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Very Easy

Concept notes: MAN stands for Metropolitan Area Network, which is a type of computer network that spans a city or a large campus.

Common Mistakes: Students may confuse MAN with other network types such as LAN (Local Area Network) or WAN (Wide Area Network).

Explanations: MAN is a network that connects different LANs within a city or a large campus. It is designed to cover a larger geographical area than a LAN but smaller than a WAN. The term "Metropolitan" in MAN refers to the city-wide coverage, making it the correct interpretation.

Option Analysis:

Option A: Metropolis Area Network is incorrect as there is no such term in networking.
Option B: Micro Access Network is incorrect as it does not align with the standard networking terminology.
Option C: Mid-sized Area Network is incorrect as it does not match the standard term used in networking.
Option D: Metropolitan Area Network is the correct term for MAN.

Mnemonic: MAN: Metropolitan Area Network

1404. A MAN usually has slow connection speeds

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: The statement "A MAN usually has slow connection speeds" is incorrect. MAN stands for Metropolitan Area Network, which typically offers faster connection speeds compared to other types of networks like WANs (Wide Area Networks).

Common Mistakes: Students may confuse MAN with WAN, which often has slower connection speeds due to its larger geographical coverage.

Explanations: MANs are designed to cover a larger area than LANs (Local Area Networks) but smaller than WANs. They are often used in cities or large organizations and provide higher bandwidth and faster connection speeds compared to WANs. Therefore, the statement that a MAN usually has slow connection speeds is false.

Option Analysis:

Option A: This option is incorrect because MANs typically offer faster connection speeds.
Option B: This option is correct because MANs are known for their higher bandwidth and faster connection speeds.

Mnemonic: MAN = Metropolitan Area Network = Fast Speeds

1405. Which of the following layer is called as end to end layer?

Correct Answer: Correct answer is: (D) Transport Layer.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Moderate

Concept notes: The Transport Layer is responsible for end-to-end communication between applications on different hosts. It ensures reliable data transfer and manages flow control and error recovery.

Common Mistakes: Students often confuse the Transport Layer with the Network Layer, which is responsible for routing data between different networks.

Explanations: The Transport Layer is considered the end-to-end layer because it provides services that ensure data is reliably transmitted from the source application to the destination application, regardless of the underlying network infrastructure. This layer handles segmentation, reassembly, flow control, and error detection and correction, making it essential for end-to-end communication.

Option Analysis:

Option A: The Physical Layer deals with the physical transmission of data over a medium and is not responsible for end-to-end communication.
Option B: The Data Link Layer is responsible for reliable data transfer between adjacent network nodes and does not handle end-to-end communication.
Option C: The Network Layer is responsible for routing data between different networks but does not handle end-to-end communication between applications.
Option D: The Transport Layer is responsible for end-to-end communication between applications on different hosts, making it the correct answer.

1406. What is good about coaxial cable?

Correct Answer: Correct answer is: (C) Can transmit a lot of data successfully.

Exam Relevance: AP Physics, SAT II Physics, GED

Difficulty: Moderate

Concept notes: Coaxial cable is known for its ability to transmit large amounts of data with minimal interference and high reliability.

Common Mistakes: Students may confuse coaxial cable with other types of cables that have different transmission capabilities.

Explanations: Coaxial cable is designed with a central conductor surrounded by insulation, a braided shield, and an outer jacket. This design minimizes electromagnetic interference and allows for high-speed data transmission over long distances. The braided shield and the outer jacket protect the central conductor from external interference, ensuring that data can be transmitted successfully with high fidelity.

Option Analysis:

Option A: The color of the cable is not a significant factor in its functionality.
Option B: While coaxial cable can be used for Internet connections, this is not its primary advantage.
Option C: This is the correct answer as coaxial cable is designed to transmit large amounts of data successfully.
Option D: Coaxial cable can be used for TV, but this is not its primary advantage.

Mnemonic: Cable, Central Conductor, Shielded, Successful Transmission

1407. Who owns the Internet?

Correct Answer: Correct answer is: (D) No one really.

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

Difficulty: Moderate

Concept notes: The Internet is a decentralized network of networks, with no single entity owning it.

Common Mistakes: Students may mistakenly believe that a specific government, company, or individual owns the Internet.

Explanations: The Internet is a global network of interconnected computer networks that operate using standardized communication protocols. It is not owned by any single entity, government, or organization. Instead, it is maintained and operated by a diverse group of organizations, including private companies, government agencies, and educational institutions. This decentralized structure ensures that no single entity has complete control over the Internet.

Option Analysis:

Option A: Incorrect. The Internet is not owned by any individual.
Option B: Incorrect. The USSR no longer exists and never owned the Internet.
Option C: Incorrect. TSTT (Telecommunications Services of Trinidad and Tobago) is a telecommunications company and does not own the Internet.
Option D: Correct. No single entity owns the Internet.

1408. Difference between TCP/IP protocol suite and OSI Layer

Correct Answer: Correct answer is: (A) TCP/IP application layer includes AL, Presentation Layer and Session Layers of OSI.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The TCP/IP model and the OSI model are two different network communication models. The TCP/IP model has four layers, while the OSI model has seven layers. The TCP/IP application layer corresponds to the OSI application, presentation, and session layers.

Common Mistakes: Students often confuse the layers of the TCP/IP model with those of the OSI model, leading to incorrect associations between the layers.

Explanations: The TCP/IP model simplifies the OSI model by combining multiple layers into fewer layers. Specifically, the TCP/IP application layer encompasses the functions of the OSI application, presentation, and session layers. This consolidation is done to streamline the model and make it more practical for implementation.

Option Analysis:

Option A: Correct. The TCP/IP application layer includes the functions of the OSI application, presentation, and session layers.
Option B: Incorrect. The TCP/IP application layer does not include the OSI network layer.
Option C: Incorrect. The TCP/IP application layer does not include the OSI transport layer.
Option D: Incorrect. The TCP/IP application layer does not include the OSI data link layer.

1409. The internet is the worlds biggest

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

Exam Relevance: AP Computer Science Principles, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: The internet is a global network of interconnected computer networks, which fits the definition of a Wide Area Network (WAN).

Common Mistakes: Students may confuse LAN (Local Area Network) with WAN, thinking the internet is a local network.

Explanations: The internet connects computers and networks across the world, which is the primary characteristic of a Wide Area Network (WAN). A Local Area Network (LAN) is limited to a small geographical area, such as a single building or campus, and does not encompass the global scale of the internet.

Option Analysis:

Option A: LAN is incorrect because it refers to a network confined to a small area, not the global scale of the internet.
Option B: WAN is correct because it refers to a network that spans a large geographical area, which accurately describes the internet.

Mnemonic: WAN: World-wide Area Network

1410. A modem enable a computer to transmit data over telephone line.

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

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

Difficulty: Very Easy

Concept notes: A modem is a device that enables a computer to transmit data over telephone lines by converting digital signals into analog signals and vice versa.

Common Mistakes: Students might confuse the function of a modem with other network devices like routers or switches, which do not perform the same signal conversion.

Explanations: A modem is designed to convert digital data from a computer into analog signals that can be transmitted over telephone lines. This conversion allows the data to travel through the telephone network and be received by another modem, which then converts the analog signals back into digital data. Therefore, the statement is true.

Option Analysis:

Option A: Correct. A modem does enable a computer to transmit data over telephone lines.
Option B: Incorrect. This option contradicts the function of a modem.

Mnemonic: Modem = Modulate-Demodulate

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Computer networking MCQ - Set 141

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