Computer networking MCQ

1541. A network consists of only one computer

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

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

Difficulty: Very Easy

Concept notes: A network requires at least two or more devices to communicate with each other.

Common Mistakes: Students might think a single computer can form a network because it can have multiple components.

Explanations: A network is defined as a system of interconnected devices that can communicate with each other. A single computer, even if it has multiple components, does not constitute a network because there is no interconnection with other devices.

Option Analysis:

Option A: This option is incorrect because a network requires at least two devices to communicate.
Option B: This option is correct because a network cannot consist of only one computer.

1542. A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?

Correct Answer: Correct answer is: (B) 6 Kbps.

Exam Relevance: GATE, ECE exams, Computer Networks exams

Difficulty: Moderate

Concept notes: The maximum data rate for a noiseless channel is determined by the Nyquist theorem, which states that the maximum data rate is twice the bandwidth of the channel, assuming binary signaling.

Common Mistakes: Students often confuse the Nyquist theorem with Shannon's theorem, which applies to noisy channels and includes a factor for signal-to-noise ratio.

Explanations: The Nyquist theorem states that the maximum data rate for a noiseless channel is twice the bandwidth of the channel. Given a 3 KHz channel, the maximum data rate is calculated as follows: 1. Bandwidth (B) = 3 KHz 2. Maximum data rate = 2 * B = 2 * 3 KHz = 6 Kbps

Option Analysis:

Option A: 3 Kbps is incorrect because it does not account for the factor of 2 in the Nyquist theorem.
Option B: 6 Kbps is correct as it follows the Nyquist theorem for a noiseless channel.
Option C: 12 Kbps is incorrect because it overestimates the data rate by a factor of 2.
Option D: 24 Kbps is incorrect as it overestimates the data rate by a factor of 4.

1543. What is the name of the type of network that doesn't have a server?

Correct Answer: Correct answer is: (B) Peer to Peer.

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

Difficulty: Easy

Concept notes: In a Peer to Peer network, each computer acts as both a client and a server, sharing resources directly with each other without the need for a dedicated server.

Common Mistakes: Students may confuse Peer to Peer networks with Client/Server networks, where a central server manages resource sharing.

Explanations: In a Peer to Peer network, there is no central server. Each computer (or peer) can communicate directly with other peers, sharing resources and data. This decentralized structure means that any computer can act as both a client and a server, eliminating the need for a dedicated server.

Option Analysis:

Option A: Client/Server networks have a central server that manages resource sharing, which is not the case in a network without a server.
Option B: Peer to Peer networks do not have a dedicated server, as each computer can act as both a client and a server.
Option C: Server to Server networks imply multiple servers, which contradicts the concept of a network without a server.
Option D: Client to Client networks are not a standard network type and do not accurately describe a network without a server.

1544. ..... is a local or restricted communication network.

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

Exam Relevance: Networking exams, Computer Science exams, Information Technology exams

Difficulty: Easy

Concept notes: An intranet is a private network that is used within an organization or a group of organizations. It is a local or restricted communication network that is not accessible to the public.

Common Mistakes: Students may confuse the internet with an intranet, as both are networks, but the internet is a global network accessible to the public, whereas an intranet is a private network.

Explanations: An intranet is a local or restricted communication network used within an organization. It is designed to be private and secure, accessible only to authorized users. This makes it different from the internet, which is a global network accessible to anyone. Therefore, the correct answer is Intranet.

Option Analysis:

Option A: The Internet is a global network accessible to the public, not a local or restricted network.
Option B: An Intranet is a local or restricted communication network used within an organization, which matches the description given in the question.
Option C: Arpanet was an early packet switching network and a precursor to the internet, not a local or restricted network.
Option D: Interspace is not a recognized term for a communication network.

1545. The rules that describe how clients and servers communicate across a network

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

Exam Relevance: CISSP, CCNA, CompTIA Network+

Difficulty: Easy

Concept notes: Protocols are the rules and standards that govern how data is transmitted and received over a network.

Common Mistakes: Students may confuse protocols with specific protocols like TCP or IP, which are examples of protocols rather than the general concept.

Explanations: Protocols define the rules for communication between clients and servers across a network. They ensure that data is transmitted in a structured and consistent manner, allowing different systems to communicate effectively. While TCP and IP are specific protocols, the term "protocols" encompasses all such rules and standards.

Option Analysis:

Option A: IP is a specific protocol used for addressing and routing packets of data, not the general term for communication rules.
Option B: TCP is a specific protocol that ensures reliable data transmission, but it is not the general term for communication rules.
Option C: TCP/IP is a suite of protocols, but it is not the general term for all communication rules.
Option D: Protocols are the general term for the rules that govern communication between clients and servers.

1546. Which of the following is the smallest computer network?

Correct Answer: Correct answer is: (B) Local Area Network (LAN).

Exam Relevance: IT Essentials, CompTIA A+, Network+ exams

Difficulty: Easy

Concept notes: Local Area Networks (LANs) are the smallest type of computer networks, typically covering a small geographic area like a home, office, or school.

Common Mistakes: Students may confuse LAN with WAN, thinking WAN is smaller because it sounds like a local network.

Explanations: Local Area Networks (LANs) are designed to connect devices within a limited area, such as a single building or a group of buildings. They are smaller in scale compared to other network types like MANs and WANs, which cover larger geographic areas.

Option Analysis:

Option A: Large Area Network (LAN) is not a standard term; the correct term is Local Area Network (LAN).
Option B: Local Area Network (LAN) is the smallest type of network, typically covering a small geographic area.
Option C: Metropolitan Area Network (MAN) covers a larger area than a LAN, typically a city or large campus.
Option D: Wide Area Network (WAN) covers the largest area, spanning regions, countries, or even globally.

Mnemonic: LAN - Local Area Network, think "Local" for "Little."

1547. End-to-end connectivity is provided from host-to-host in

Correct Answer: Correct answer is: (B) The transport layer.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Moderate

Concept notes: The transport layer is responsible for end-to-end connectivity between hosts, ensuring reliable data transfer.

Common Mistakes: Students often confuse the network layer with the transport layer, as both are involved in data transmission.

Explanations: The transport layer provides end-to-end connectivity by establishing and maintaining connections between hosts. It ensures that data is transmitted reliably and in the correct order, handling issues like packet loss and retransmission. The network layer, on the other hand, is responsible for routing data between different networks, but does not provide end-to-end connectivity.

Option Analysis:

Option A: The network layer is responsible for routing data between different networks, not for end-to-end connectivity.
Option B: The transport layer provides end-to-end connectivity by establishing and maintaining connections between hosts.
Option C: The session layer manages sessions between applications, but does not provide end-to-end connectivity.
Option D: End-to-end connectivity is a specific function of the transport layer, not a combined functionality of the network and data link layers.

1548. "A..... is a collection of computers and other hardware components interconnected by communication channels (cables or satelite) that allows sharing of resources and information"

Correct Answer: Correct answer is: (B) Computer network.

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

Difficulty: Easy

Concept notes: A computer network is a collection of interconnected devices that share resources and information.

Common Mistakes: Students may confuse a computer network with a local network, which is a type of computer network but not the general term.

Explanations: A computer network is defined as a collection of computers and other hardware components interconnected by communication channels that allow sharing of resources and information. This matches the description given in the question.

Option Analysis:

Option A: Local network is a type of computer network, but it is not the general term for all interconnected devices.
Option B: Computer network is the correct term for a collection of interconnected devices that share resources and information.
Option C: WAN network is a type of computer network, but it is not the general term for all interconnected devices.
Option D: Peer-to-peer is a type of network topology, not the general term for all interconnected devices.

1549. In a type of computer network, what does MAN stands for?

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

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

Difficulty: Easy

Concept notes: MAN stands for Metropolitan Area Network, which is a type of computer network that covers a larger geographical area than a local area network (LAN) but smaller than a wide area network (WAN).

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

Explanations: MAN stands for Metropolitan Area Network. This term is used to describe a network that spans a city or a large campus. It is larger than a LAN, which typically covers a single building or a small group of buildings, but smaller than a WAN, which can cover a country or even the entire world. The term "Metropolitan" in MAN refers to the network's coverage of a metropolitan area, which is a large urban area.

Option Analysis:

Option A: Major area network is incorrect. The term "Major" is not used in network terminology for this type of network.
Option B: Mini area network is incorrect. The term "Mini" does not accurately describe the scale of a MAN, which is larger than a LAN.
Option C: Metropolitan area network is the correct term for a network that covers a city or large campus.

Mnemonic: MAN: Metropolitan Area Network

1550. What is the major advantage to a business using a VPN instead of a dedicated private WAN?

Correct Answer: Correct answer is: (A) It is cheaper.

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: A Virtual Private Network (VPN) allows businesses to create a secure connection over a public network, such as the internet, which is generally less expensive than maintaining a dedicated private Wide Area Network (WAN).

Common Mistakes: Students may mistakenly believe that a dedicated private WAN is more secure, leading them to overlook the cost advantage of a VPN.

Explanations: A dedicated private WAN requires significant investment in infrastructure and maintenance, whereas a VPN leverages existing public networks, reducing the need for extensive physical infrastructure. This makes a VPN a more cost-effective solution for businesses.

Option Analysis:

Option A: Correct. A VPN is cheaper because it uses public networks and does not require the same level of infrastructure investment as a dedicated private WAN.
Option B: Incorrect. A VPN is not necessarily faster than a dedicated private WAN, as speed can depend on various factors including network congestion and quality of service.
Option C: Incorrect. While a VPN can be secure, the primary advantage highlighted in the question is cost, not security.
Option D: Incorrect. A dedicated private WAN is typically more expensive than a VPN.

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Computer networking MCQ - Set 155

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