Computer networking MCQ – Change your future

431. 4. Popular forms of information include text, pictures, audio, video etc.

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: The message is the information that is transmitted from the sender to the receiver. It can be in various forms such as text, pictures, audio, and video.

Common Mistakes: Students may confuse the message with the transmission media, which is the channel through which the message is sent.

Explanations: The message is the content that is being communicated, which includes text, pictures, audio, and video. The other options refer to different components of the communication process: the sender is the originator of the message, the receiver is the recipient, and the transmission media is the medium through which the message is conveyed.

Option Analysis:

Option A: Message is the correct answer as it encompasses the various forms of information such as text, pictures, audio, and video.
Option B: Sender is the individual or entity that initiates the communication, not the form of information.
Option C: Receiver is the individual or entity that receives the communication, not the form of information.
Option D: Transmission Media is the channel through which the message is sent, not the form of information.

432. What is the meaning LAN?

Correct Answer: Correct answer is: (A) A network joins a computers in a single building.

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

Difficulty: Easy

Concept notes: LAN stands for Local Area Network, which is a computer network that connects computers within a limited area such as a residence, school, or office building.

Common Mistakes: Students may confuse LAN with WAN (Wide Area Network), which connects computers over a larger geographical area.

Explanations: LAN, or Local Area Network, is designed to connect computers within a limited area, such as a single building. This makes it distinct from WAN, which connects computers over a larger geographical area. The correct answer reflects the definition of a LAN.

Option Analysis:

Option A: Correct. LAN connects computers within a limited area, such as a single building.
Option B: Incorrect. This describes a WAN (Wide Area Network), which connects computers over a larger geographical area.
Option C: Incorrect. This describes the Internet, which is a global network connecting millions of computers worldwide.

Mnemonic: LAN: Local Area Network, Limited Area Network

433. All data transferred from one computer to another passes through a central device.

Correct Answer: Correct answer is: (C) Star.

Exam Relevance: CCNA, Network+ Certification, High School Computer Science Exams

Difficulty: Moderate

Concept notes: In a star network topology, all devices are connected to a central hub or switch. This central device acts as a conduit for all data transfers between devices.

Common Mistakes: Students may confuse the star topology with other network topologies like bus or ring, where data transfer mechanisms differ.

Explanations: In a star topology, all data transferred from one computer to another passes through a central device, such as a hub or switch. This central device manages the data flow, ensuring that data packets are correctly routed to their intended destination. This characteristic makes the star topology the correct answer.

Option Analysis:

Option A: A bus topology does not have a central device; instead, all devices are connected to a single backbone cable.
Option B: A ring topology connects devices in a circular configuration, with data passing from one device to the next.
Option C: A star topology has all devices connected to a central hub or switch, making it the correct answer.
Option D: "Car" is not a network topology and is irrelevant to the question.

Mnemonic: Star = Central Hub

434. If ONE computer breaks in a RING TOPOLOGY, the network will .....

Correct Answer: Correct answer is: (B) Fail and shut down.

Exam Relevance: Network+ Certification, CCNA, ITIL Foundation

Difficulty: Moderate

Concept notes: In a ring topology, each computer is connected to two other computers, forming a closed loop. If one computer fails, the loop is broken, disrupting the network.

Common Mistakes: Students may mistakenly believe that a ring topology can reroute data around a failed node, similar to a mesh topology.

Explanations: In a ring topology, data travels in one direction around the loop. If one computer fails, the loop is broken, and data cannot travel to other computers. This results in the entire network failing and shutting down.

Option Analysis:

Option A: This is incorrect because a ring topology does not have redundancy to bypass a failed node.
Option B: This is correct because the failure of one node in a ring topology breaks the loop, causing the network to fail.

Mnemonic: Ring breaks, network stops.

435. Generally ranges from 10 - 50 Km

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: MAN stands for Metropolitan Area Network, which typically covers a city or a large campus. The range of a MAN is generally between 10 to 50 kilometers.

Common Mistakes: Students often confuse MAN with LAN (Local Area Network) or WAN (Wide Area Network). LANs are smaller in range, typically within a building, while WANs cover much larger areas, such as cities or countries.

Explanations: MANs are designed to cover a larger area than LANs but are not as expansive as WANs. The range of 10 to 50 kilometers is characteristic of MANs, making it the correct answer.

Option Analysis:

Option A: LANs typically cover a smaller area, such as a single building or campus, and do not extend to the range of 10 to 50 kilometers.
Option B: MANs are designed to cover a city or large campus, fitting the range of 10 to 50 kilometers.
Option C: WANs cover much larger areas, such as cities or countries, and do not fit the specific range of 10 to 50 kilometers.

Mnemonic: MAN: Metropolitan Area Network, "Metropolis" for "Medium" range.

436. Chunks of data sent over the internet are known as...

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

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

Difficulty: Easy

Concept notes: Data sent over the internet is divided into smaller units called packets.

Common Mistakes: Students may confuse packets with protocols, which are sets of rules for communication, or ports, which are endpoints for communication.

Explanations: Data transmitted over the internet is broken down into smaller units called packets. These packets are then sent individually over the network and reassembled at the destination. This method ensures efficient and reliable data transmission.

Option Analysis:

Option A: Correct. Packets are the correct term for the chunks of data sent over the internet.
Option B: Incorrect. Protocol refers to a set of rules for communication, not the data itself.
Option C: Incorrect. Port is an endpoint for communication, not the data being sent.
Option D: Incorrect. Message is a broader term and not the specific term used for data chunks in networking.

Mnemonic: Packets are like puzzle pieces (P for Packets, P for Puzzle).

437. Networks allow computers to share

Correct Answer: Correct answer is: (C) Resources.

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

Difficulty: Easy

Concept notes: Networks allow computers to share resources such as files, printers, and internet connections.

Common Mistakes: Students may mistakenly think that networks share physical components like electricity or mice, rather than abstract resources.

Explanations: Networks enable multiple computers to connect and share resources. This includes sharing files, printers, and internet access, which are all examples of resources. Sharing electricity, cables, or mice does not align with the primary function of a network.

Option Analysis:

Option A: Electricity is not a resource shared by networks.
Option B: Cables are used to connect computers in a network but are not shared resources.
Option C: Resources such as files, printers, and internet access are shared through networks.
Option D: Mice are physical devices and not shared resources in a network.

438. Which of these is a benefit of cloud computing?

Correct Answer: Correct answer is: (B) It can reduce costs for a company as they do not need to buy additional hardware to store data.

Exam Relevance: CFA, CPA, PMP, CISSP

Difficulty: Moderate

Concept notes: Cloud computing allows companies to store and process data on remote servers managed by third-party providers, reducing the need for on-premises hardware.

Common Mistakes: Students may mistakenly believe that cloud computing is always the cheapest option or that data security is inherently better in the cloud.

Explanations: Cloud computing reduces costs for a company by eliminating the need to purchase, maintain, and upgrade physical hardware for data storage. Instead, companies can pay for cloud services on a subscription or usage-based model, which can be more cost-effective, especially for small to medium-sized businesses.

Option Analysis:

Option A: This is incorrect because while cloud computing can offer enhanced security features, it does not guarantee that data will always be more secure than on-premises solutions.
Option B: This is correct because cloud computing allows companies to avoid the upfront costs of purchasing and maintaining hardware for data storage.
Option C: This is incorrect because cloud computing services are not free; companies pay for the services they use, which can vary based on usage and subscription models.
Option D: This is incorrect because an internet connection is required to access data and software stored in cloud computing systems.

Mnemonic: Cloud saves, hardware fades.

439. An enhanced encryption protocol combining a 104-bit key and a 24-bit initialization vector

Correct Answer: Correct answer is: (A) WEP 128.

Exam Relevance: CISSP, CompTIA Security+

Difficulty: Moderate

Concept notes: WEP 128 uses a 104-bit key and a 24-bit initialization vector (IV), making it a 128-bit encryption protocol.

Common Mistakes: Students may confuse WEP 128 with WEP 64, which uses a 40-bit key and a 24-bit IV.

Explanations: WEP 128 combines a 104-bit key with a 24-bit initialization vector, resulting in a total of 128 bits. This combination is characteristic of WEP 128, making it the correct answer. WEP 64 uses a 40-bit key, and WPA uses a more complex encryption method that is not based on a simple combination of key and IV sizes.

Option Analysis:

Option A: WEP 128 uses a 104-bit key and a 24-bit IV, which matches the description.
Option B: WEP 64 uses a 40-bit key and a 24-bit IV, which does not match the description.
Option C: WPA uses a more complex encryption method and does not fit the simple key and IV combination described.

Mnemonic: 104 + 24 = 128

440. What is an Internet Protocol?

Correct Answer: Correct answer is: (C) Some bits of information we should add to message to make sure they are delivered.

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

Difficulty: Moderate

Concept notes: The Internet Protocol (IP) is a set of rules for routing and addressing packets of data so they can be delivered over the internet.

Common Mistakes: Students may confuse IP with other internet-related terms like IP address or think it is a device or information about a wifi network.

Explanations: The Internet Protocol (IP) is a set of rules that govern how data is transmitted and routed across the internet. It includes the addition of headers to data packets, which contain information such as the source and destination addresses, ensuring that the data is delivered correctly. This aligns with the correct answer, which states that IP involves adding bits of information to messages to ensure delivery.

Option Analysis:

Option A: Incorrect, as IP is not a device for delivering email messages.
Option B: Incorrect, as IP is not information about a wifi network.
Option C: Correct, as IP involves adding headers to data packets to ensure delivery.
Option D: Incorrect, as IP is not information that helps get connected to the internet.

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Computer networking MCQ - Set 44

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