Computer networking MCQ – Change your future

451. How many topologies are available to connect a network

Correct Answer: Correct answer is: (A) 5.

Exam Relevance: CCNA, Network+, CIW

Difficulty: Moderate

Concept notes: The number of topologies available to connect a network includes bus, ring, star, mesh, and hybrid topologies.

Common Mistakes: Students may overlook hybrid topologies, which combine features of other topologies, leading to an incorrect count.

Explanations: Network topologies are the arrangements of nodes and connections in a network. The five main types are: 1. Bus topology: All devices are connected to a single central cable. 2. Ring topology: Devices are connected in a closed loop configuration. 3. Star topology: All devices are connected to a central hub. 4. Mesh topology: Each device is connected to every other device. 5. Hybrid topology: A combination of two or more different topologies. The claimed correct answer, 5, includes all these main types.

Option Analysis:

Option A: Correct. The five main topologies are bus, ring, star, mesh, and hybrid.
Option B: Incorrect. This does not account for all the main topologies.
Option C: Incorrect. This does not account for all the main topologies.
Option D: Incorrect. This does not account for all the main topologies.

Mnemonic: Bus, Ring, Star, Mesh, Hybrid - BRSMH

452. Which of the following is the multiple access protocol for channel access control?

Correct Answer: Correct answer is: (C) Both CSMA/CD & CSMA/CA

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Moderate

Concept notes: CSMA/CD (Carrier Sense Multiple Access with Collision Detection) and CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) are both multiple access protocols used for channel access control in computer networks.

Common Mistakes: Students often confuse CSMA/CD and CSMA/CA, thinking they are mutually exclusive protocols rather than both being valid multiple access protocols.

Explanations: CSMA/CD is used in wired networks, particularly in Ethernet, where it detects collisions and retries transmission. CSMA/CA is used in wireless networks, where it avoids collisions by reserving the channel before transmission. Both protocols are designed to manage access to a shared communication channel, making them both valid multiple access protocols.

Option Analysis:

Option A: CSMA/CD is a valid multiple access protocol but not the only one.
Option B: CSMA/CA is a valid multiple access protocol but not the only one.
Option C: Both CSMA/CD and CSMA/CA are valid multiple access protocols, making this the correct answer.
Option D: HDLC (High-Level Data Link Control) is a data link layer protocol, not a multiple access protocol.

453. It was the first-generation security standard for wireless network.

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

Exam Relevance: CISSP, CompTIA Security+, Network+

Difficulty: Easy

Concept notes: Wired Equivalent Privacy (WEP) was the first security protocol developed for wireless networks.

Common Mistakes: Students may confuse WEP with WPA (Wi-Fi Protected Access), which came later and is more secure.

Explanations: WEP was the initial security standard for wireless networks, introduced in 1997. It aimed to provide security comparable to that of wired networks. However, it was later found to have significant vulnerabilities and was replaced by more secure protocols like WPA and WPA2.

Option Analysis:

Option A: LEAP (Lightweight Extensible Authentication Protocol) is an authentication protocol, not a security standard for wireless networks.
Option B: WEP (Wired Equivalent Privacy) was the first security standard for wireless networks.
Option C: WPA (Wi-Fi Protected Access) is a later security protocol that succeeded WEP, offering improved security features.

Mnemonic: WEP: Wireless Equivalent Privacy, First in Line

454. What is meant by latency in the performance of a network? (6-9)

Correct Answer: Correct answer is: (A) The amount of time data takes to travel from the source to the destination.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: Latency in network performance refers to the delay before a transfer of data begins following an instruction for its transfer.

Common Mistakes: Students often confuse latency with bandwidth, which is the maximum rate of data transfer.

Explanations: Latency is defined as the time it takes for data to travel from the source to the destination. This includes the time taken for the data to be processed, transmitted, and received. It is a critical measure of network performance, as it directly affects the responsiveness of the network.

Option Analysis:

Option A: Correct. Latency is the time it takes for data to travel from the source to the destination.
Option B: Incorrect. This describes bandwidth, not latency.
Option C: Incorrect. This describes error rate, not latency.
Option D: Incorrect. This describes routing, not latency.

455. What does a server store?

Correct Answer: Correct answer is: (B) Software and client data.

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Moderate

Concept notes: Servers are designed to store and manage both software and client data.

Common Mistakes: Students may mistakenly believe that servers only store client data or only software.

Explanations: Servers are essential components in networked environments, designed to store and manage both software and client data. Software includes applications, operating systems, and other programs that run on the server. Client data encompasses user files, databases, and other information that clients access through the server. Therefore, the correct answer is that servers store both software and client data.

Option Analysis:

Option A: Incorrect, as servers store more than just client data.
Option B: Correct, as servers store both software and client data.
Option C: Incorrect, as servers do not exclusively store backup files.
Option D: Incorrect, as servers store more than just software.

456. What does VLAN stand for?

Correct Answer: Correct answer is: (A) Virtual Local Area Network.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Very Easy

Concept notes: VLAN stands for Virtual Local Area Network. It is a network technology that allows network administrators to partition a physical network into multiple logical networks.

Common Mistakes: Students may confuse VLAN with other network-related acronyms or terms, such as VLN (Visual Local Area Network) or VIAN (Video Local Area Network).

Explanations: VLAN stands for Virtual Local Area Network. This term is widely used in networking to describe a method of creating multiple virtual networks within a single physical network infrastructure. VLANs are used to segment a network into smaller, more manageable parts, improving network performance and security.

Option Analysis:

Option A: Correct. VLAN stands for Virtual Local Area Network.
Option B: Incorrect. Visual Local Area Network is not a recognized term in networking.
Option C: Incorrect. Virtual Land Access Network is not a recognized term in networking.
Option D: Incorrect. Video Local Area Network is not a recognized term in networking.

Mnemonic: VLAN: Virtual Local Area Network

457. In wired networks, this device allows multiple devices in a network to link with one another.

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

Exam Relevance: CCNA, CompTIA Network+, A+ Certification

Difficulty: Easy

Concept notes: A hub is a networking device that allows multiple devices to connect and communicate with each other in a network.

Common Mistakes: Students may confuse a hub with a router, which is a more advanced device that routes data between different networks.

Explanations: A hub is a simple device that connects multiple devices in a network and allows them to communicate with each other. It does not perform any routing or filtering of data, but simply forwards data to all connected devices. This makes it suitable for small networks where all devices need to communicate with each other.

Option Analysis:

Option A: Correct. A hub allows multiple devices to connect and communicate in a network.
Option B: Incorrect. Fiber optic cable is a type of network cable, not a device that connects multiple devices.
Option C: Incorrect. A network interface card (NIC) is a component in a device that allows it to connect to a network, but it does not connect multiple devices.
Option D: Incorrect. A router is a device that routes data between different networks, but it is not the primary device for connecting multiple devices in a single network.

Mnemonic: Hub: Helps Unite Buses (devices)

458. ..... are used in the place of IP address because they are easier to remember.

Correct Answer: Correct answer is: (A) Domain names.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Domain names are used to represent IP addresses in a more user-friendly format.

Common Mistakes: Students may confuse domain names with protocols, which are sets of rules for communication between devices.

Explanations: Domain names are used in place of IP addresses because they are easier for humans to remember and use. IP addresses are numerical and can be difficult to recall, whereas domain names are alphanumeric and often reflect the name or purpose of the website or service. This makes domain names more convenient for users to access internet resources.

Option Analysis:

Option A: Correct. Domain names are used to represent IP addresses in a more user-friendly format.
Option B: Incorrect. Protocols are sets of rules for communication between devices, not used to represent IP addresses.
Option C: Incorrect. Routers are devices that direct data traffic between networks, not used to represent IP addresses.
Option D: Incorrect. Hosts are devices connected to a network, not used to represent IP addresses.

Mnemonic: DNS: Domain Names Simplify

459. URL stands for which of the following?

Correct Answer: Correct answer is: (B) Uniform Resource Locator.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: URL stands for Uniform Resource Locator, which is a reference to a resource on the internet.

Common Mistakes: Students may confuse URL with other acronyms like URI (Uniform Resource Identifier) or UML (Unified Modeling Language).

Explanations: URL is the correct term because it accurately describes the function of a web address, which is to locate resources on the internet. The term "Uniform" indicates that the format is consistent and standardized, while "Resource Locator" indicates its function of pointing to specific resources.

Option Analysis:

Option A: Incorrect because "Universal" is not the correct term used in the acronym.
Option B: Correct because "Uniform Resource Locator" is the accurate term for a web address.
Option C: Incorrect because "Location" alone does not fully capture the standardized nature of the term.
Option D: Incorrect because "Unidentified Random Location" is not related to the concept of a web address.

Mnemonic: URL: Uniform Resource Locator

460. A .....network is a network topology in which each node relays data for the network.

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

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Moderate

Concept notes: In a mesh network, each node is connected to multiple other nodes, allowing data to be relayed through multiple paths.

Common Mistakes: Students may confuse mesh networks with star networks, where nodes are connected to a central hub rather than to each other.

Explanations: In a mesh network, each node is directly connected to multiple other nodes, enabling data to be relayed through multiple paths. This topology ensures that if one path fails, data can still be transmitted through alternative routes. This characteristic of relaying data through multiple nodes makes the mesh network the correct answer.

Option Analysis:

Option A: In a star network, nodes are connected to a central hub, not to each other, so they do not relay data for the network.
Option B: In a mesh network, each node is connected to multiple other nodes, allowing data to be relayed through multiple paths, making it the correct answer.

Mnemonic: Mnemonic: Mesh = Many paths, Star = Single hub.

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Computer networking MCQ - Set 46

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