Computer networking MCQ

1481. Requests information from a server

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

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

Difficulty: Easy

Concept notes: A client is a computer or device that requests information from a server.

Common Mistakes: Students may confuse the roles of a client and a server, thinking that a server requests information from a client.

Explanations: A client is a device or software that requests information or services from a server. In a client-server model, the client initiates the communication and the server responds to the client's requests. This makes the client the correct answer as it is the entity that requests information from a server.

Option Analysis:

Option A: Correct. A client requests information from a server.
Option B: Incorrect. A server provides information to a client.
Option C: Incorrect. A node is a point in a network, not specifically a requester of information.
Option D: Incorrect. The Internet is a network of networks, not a requester of information.

1482. Which term describes a set of rules that computers on a network use to communicate with one another?

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

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

Difficulty: Easy

Concept notes: A protocol is a set of rules that govern how computers communicate over a network.

Common Mistakes: Students may confuse the term "protocol" with "method," which refers to a specific procedure or process, not a set of communication rules.

Explanations: A protocol defines the rules and standards that ensure data is transmitted correctly and efficiently between devices on a network. This includes rules for data format, error detection, and data flow control. Therefore, the term "protocol" is the correct answer.

Option Analysis:

Option A: Method refers to a specific procedure or process, not a set of communication rules.
Option B: Protocol is the correct term for a set of rules that govern communication between devices on a network.
Option C: Instruction refers to a command or directive, not a set of communication rules.
Option D: Conduct refers to behavior or actions, not a set of communication rules.

1483. In 10 Base 2 and 10 Base 5, 2 and 5 stands for

Correct Answer: Correct answer is: (B) Number of Segments.

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

Difficulty: Moderate

Concept notes: In the context of Ethernet standards, the numbers in 10 Base 2 and 10 Base 5 refer to the number of segments allowed in the network.

Common Mistakes: Students often confuse the numbers with other parameters such as speed or segment length.

Explanations: The 10 Base 2 and 10 Base 5 standards are part of the Ethernet family. The "2" in 10 Base 2 indicates that the network can have up to 2 segments, each up to 185 meters long. Similarly, the "5" in 10 Base 5 indicates that the network can have up to 5 segments, each up to 500 meters long. Therefore, the numbers represent the number of segments allowed in the network.

Option Analysis:

Option A: The numbers do not represent speeds in Mbps. The "10" in 10 Base 2 and 10 Base 5 refers to the data rate of 10 Mbps, not the segment number.
Option B: The numbers represent the number of segments allowed in the network, which is correct.
Option C: The numbers do not represent the length of segments. The length of segments is specified separately in the standards.
Option D: The numbers do not represent the size of segments. The size of segments is not a relevant parameter in these standards.

1484. The suite of protocols and programs that supports low-level network communication.

Correct Answer: Correct answer is: (D) TCP/IP.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: TCP/IP is a suite of protocols that supports low-level network communication, enabling data transmission over the internet and other networks.

Common Mistakes: Students may confuse TCP/IP with higher-level protocols like HTTP, which is used for web communication, or with P2P, which is a type of network architecture.

Explanations: TCP/IP (Transmission Control Protocol/Internet Protocol) is a suite of protocols that supports low-level network communication. It includes protocols for data transmission, error detection, and routing. HTTP (Hypertext Transfer Protocol) is a higher-level protocol used for web communication, P2P (Peer-to-Peer) is a network architecture, and Gateway is a device that connects two different networks. Therefore, TCP/IP is the correct answer as it directly supports low-level network communication.

Option Analysis:

Option A: HTTP is a higher-level protocol used for web communication, not a suite of protocols for low-level network communication.
Option B: P2P is a network architecture, not a suite of protocols for low-level network communication.
Option C: Gateway is a device that connects two different networks, not a suite of protocols for low-level network communication.
Option D: TCP/IP is a suite of protocols that supports low-level network communication, making it the correct answer.

1485. Which of these is the correct explanation of bandwidth?

Correct Answer: Correct answer is: (B) BANDWIDTH is the amount of data that can be transmitted over a network in a given time.

Exam Relevance: Computer Science Exams, Networking Exams, IT Certification Exams

Difficulty: Moderate

Concept notes: Bandwidth refers to the capacity of a network to transmit data over a given period of time.

Common Mistakes: Students often confuse bandwidth with the speed of data transmission, which is incorrect. Bandwidth is about capacity, not speed.

Explanations: Bandwidth is defined as the amount of data that can be transmitted over a network in a given time. This is a measure of the capacity of the network, not the speed at which data travels. The speed at which data travels is a separate concept known as latency or propagation delay. Therefore, the correct explanation of bandwidth is the amount of data that can be transmitted over a network in a given time.

Option Analysis:

Option A: This option incorrectly defines bandwidth as the speed of data transmission, which is not accurate.
Option B: This option correctly defines bandwidth as the amount of data that can be transmitted over a network in a given time.
Option C: This option incorrectly defines bandwidth as the number of directions data can travel, which is not related to the concept of bandwidth.

1486. Light stays inside the cables that transmit data long distances because of...

Correct Answer: Correct answer is: (C) Total internal reflection.

Exam Relevance: AP Physics, IB Physics, SAT Subject Test in Physics

Difficulty: Moderate

Concept notes: Total internal reflection occurs when light travels from a denser medium to a less dense medium and is completely reflected back into the denser medium if the angle of incidence exceeds the critical angle.

Common Mistakes: Students often confuse total internal reflection with refraction, where light bends as it passes through different mediums.

Explanations: Light stays inside the cables due to total internal reflection. When light travels through a fiber optic cable, it hits the boundary between the core and the cladding at an angle greater than the critical angle, causing it to reflect back into the core. This process repeats, allowing the light to travel long distances without significant loss.

Option Analysis:

Option A: The electromagnetic spectrum is the range of all types of electromagnetic radiation, but it does not explain how light stays within the cable.
Option B: Mirrored tubing is not used in fiber optic cables; the reflection is due to the properties of the materials and the angle of incidence.
Option C: Total internal reflection is the correct mechanism that keeps light within the fiber optic cable.
Option D: Wi-Fi waves are a form of electromagnetic radiation used for wireless communication and are not related to the mechanism of light transmission in cables.

Mnemonic: Think "TIR keeps light in the core."

1487. What does DNS stand for?

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

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

Difficulty: Very Easy

Concept notes: DNS stands for Domain Name System, which is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network.

Common Mistakes: Students often confuse DNS with other acronyms or think it stands for "Domain Name Server" instead of "Domain Name System."

Explanations: DNS is a critical component of the Internet that translates human-readable domain names into IP addresses. The correct term is "Domain Name System," not "Domain Name Server," which is a common misconception.

Option Analysis:

Option A: This is the correct answer, although the term "Server" is a common misconception. The correct term is "System."
Option B: This is incorrect. "Disconnected Name Services" is not a real term related to DNS.
Option C: This is incorrect. "Domain Naming Service" is not the correct term for DNS.

Mnemonic: DNS: Domain Name System, not Server.

1488. A Router is used to connect to.....

Correct Answer: Correct answer is: (C) External Networks.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: A router is a device that connects multiple networks, allowing data to be transmitted between them.

Common Mistakes: Students may confuse routers with switches or modems, which have different primary functions.

Explanations: A router is specifically designed to connect different networks, including external networks, by routing data packets between them. This function distinguishes it from other networking devices like switches or modems, which primarily manage internal network traffic or provide internet access, respectively.

Option Analysis:

Option A: A router can be used to connect to the Internet, but this is not its primary function. It is more accurate to say that a router connects to external networks, which may include the Internet.
Option B: While a router can connect computer networks, this is too broad and does not specifically highlight its role in connecting external networks.
Option C: This is the correct answer because a router's primary function is to connect and route data between different networks, including external networks.
Option D: A router is not used to connect to Bluetooth devices, which operate on a different protocol and are typically managed by a separate device.

Mnemonic: Routers Route, Not Modem or Switch

1489. A set of rules that govern data communication between the sender and receiver is called

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

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

Difficulty: Easy

Concept notes: A protocol is a set of rules that govern data communication between the sender and receiver.

Common Mistakes: Students may confuse the term "protocol" with "rule" or "law," which are more general terms and do not specifically refer to communication standards.

Explanations: A protocol is a specific set of rules that define how data is transmitted and received over a network. It ensures that both the sender and receiver understand the format and structure of the data being communicated. This is essential for effective and reliable communication in computer networks.

Option Analysis:

Option A: "Rule" is too general and does not specifically refer to communication standards.
Option B: "Protocol" is the correct term for the set of rules governing data communication.
Option C: "Law" is a legal term and not related to data communication standards.
Option D: "Option" is not a relevant term in this context.

1490. A PAN is a type of computer network. What does PAN stand for?

Correct Answer: Correct answer is: (C) Personal Area Network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Easy

Concept notes: A Personal Area Network (PAN) is a type of computer network that connects devices within a small area, typically within a person's reach.

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

Explanations: PAN stands for Personal Area Network, which is a network for interconnecting devices centered around an individual's workspace. This network typically includes devices such as computers, smartphones, tablets, and other peripherals within a small range, often within a few meters. The term "Personal" in PAN emphasizes that the network is designed to serve the needs of a single user.

Option Analysis:

Option A: Protocol Assisted Network is not a standard term for a type of computer network.
Option B: Planet Area Network is not a recognized term in networking.
Option C: Personal Area Network is the correct term for a network that connects devices within a small area around a person.
Option D: Practical Assistant Network is not a standard term for a type of computer network.

Mnemonic: PAN: Personal Area Network, think "Personal" for "P" and "Area" for "A" and "Network" for "N".

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Computer networking MCQ - Set 149

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