Computer networking MCQ

1611. Www.DIS.com is a

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A website is a collection of web pages and related content that is accessible via the internet using a web browser.

Common Mistakes: Students may confuse a website with a web browser, which is the software used to access websites.

Explanations: Www.DIS.com is a domain name that represents a specific location on the internet where a collection of web pages and related content can be accessed. This makes it a website.

Option Analysis:

Option A: A web browser is software used to access websites, not a website itself.
Option B: A website is a collection of web pages and related content accessible via the internet.
Option C: An application is a software program designed to perform specific tasks, not a collection of web pages.
Option D: A game is a form of entertainment, not a collection of web pages.

Mnemonic: WWW stands for World Wide Web, which is where websites live.

1612. Which of the following networks is a WAN?

Correct Answer: Correct answer is: (A) The Internet.

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

Difficulty: Easy

Concept notes: A WAN (Wide Area Network) is a network that spans a large geographical area, such as a country or even globally. The Internet is the largest WAN, connecting millions of devices worldwide.

Common Mistakes: Students may confuse WAN with LAN (Local Area Network), which is limited to a smaller area like a school or home.

Explanations: The Internet is a WAN because it connects devices across vast geographical distances, spanning continents and countries. In contrast, a school network or a home network are typically LANs, which are confined to a smaller area.

Option Analysis:

Option A: The Internet is a WAN because it connects devices globally.
Option B: A school network is a LAN, not a WAN, as it is limited to the school premises.
Option C: Your home network is a LAN, not a WAN, as it is confined to your home.

Mnemonic: WAN: Wide Area Network, World-wide Interconnection

1613. What is a Firewall in Computer Network?

Correct Answer: Correct answer is: (C) A system designed to prevent unauthorized access.

Exam Relevance: CISSP, CompTIA Security+, CCNA Security

Difficulty: Easy

Concept notes: A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

Common Mistakes: Students may confuse a firewall with other network components like routers or switches, which do not have the same security functions.

Explanations: A firewall is a system designed to prevent unauthorized access to or from a private network. It acts as a barrier between trusted internal networks and untrusted external networks, such as the Internet. By filtering traffic based on security rules, a firewall helps protect against unauthorized access and potential threats.

Option Analysis:

Option A: An operating system is software that manages computer hardware and software resources, not a security system.
Option B: The physical boundary of a network refers to the physical limits of the network infrastructure, not a security system.
Option C: This is the correct definition of a firewall, which is designed to prevent unauthorized access.
Option D: A web browsing software is an application used to access the Internet, not a security system.

Mnemonic: Firewall = Firewall = Filter + Wall

1614. A network at a single site such as an individual office building is a .....

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

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

Difficulty: Easy

Concept notes: A Local Area Network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, or office building.

Common Mistakes: Students may confuse LAN with WAN, MAN, or PAN, which are different types of networks with different coverage areas.

Explanations: A network at a single site such as an individual office building is a Local Area Network (LAN). LANs are designed to connect devices within a small geographical area, such as a single building or a group of buildings. This makes LAN the correct choice for a network confined to a single site.

Option Analysis:

Option A: Correct. LAN is the correct term for a network within a single site.
Option B: Incorrect. WAN (Wide Area Network) covers a larger geographical area, such as cities or countries.
Option C: Incorrect. PAN (Personal Area Network) is a network for personal devices within a small range, typically around a person.
Option D: Incorrect. MAN (Metropolitan Area Network) covers a larger area than a LAN but smaller than a WAN, typically a city or large campus.

Mnemonic: LAN: Local Area Network, think "Local" for "Limited" area.

1615. In this type of topology, direct communication between devices is not allowed. A device must have to communicate through a hub.

Correct Answer: Correct answer is: (B) Star Network.

Exam Relevance: CCNA, Network+ Certification

Difficulty: Easy

Concept notes: In a star network topology, all devices are connected to a central hub or switch. Direct communication between devices is not allowed; all communication must pass through the central hub.

Common Mistakes: Students may confuse the star topology with the bus topology, where devices are connected to a single backbone cable, allowing direct communication.

Explanations: In a star network, each device is connected to a central hub or switch. This central hub acts as a mediator for all communication. Therefore, direct communication between devices is not possible, as all data must pass through the hub. This characteristic makes the star network the correct answer.

Option Analysis:

Option A: In a ring network, devices are connected in a circular loop, allowing direct communication between adjacent devices. This does not match the description given in the question.
Option B: In a star network, all devices are connected to a central hub, and direct communication between devices is not allowed. This matches the description given in the question.
Option C: In a bus network, devices are connected to a single backbone cable, allowing direct communication between devices. This does not match the description given in the question.
Option D: This option is incorrect as the star network matches the description given in the question.

Mnemonic: Star = Central Hub

1616. A virus

Correct Answer: Correct answer is: (A) Attaches itself to programs or files on a computer or server.

Exam Relevance: AP Computer Science Principles, CompTIA Security+

Difficulty: Easy

Concept notes: A virus is a type of malicious software that can attach itself to programs or files on a computer or server.

Common Mistakes: Students may confuse a virus with other types of malware, such as trojans or worms, which have different methods of operation.

Explanations: A virus is a type of malware that attaches itself to programs or files on a computer or server. This attachment allows the virus to spread when the infected program or file is executed or shared. The other options describe different types of malware with distinct characteristics.

Option Analysis:

Option A: Correct. A virus attaches itself to programs or files on a computer or server.
Option B: Incorrect. While viruses can replicate, this is not the defining characteristic that distinguishes them from other types of malware.
Option C: Incorrect. This describes a type of malware known as a trojan, which disguises itself as legitimate software to trick users.
Option D: Incorrect. This describes a social engineering attack, not a virus.

Mnemonic: VIRUS: Viruses Infect and Ride on User Software

1617. A client is

Correct Answer: Correct answer is: (B) A device that connects to a server.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: In the context of computer networking, a client is a device that connects to a server to request and receive services or data.

Common Mistakes: Students often confuse the term "client" with a person or entity that pays for services, which is a common usage in business contexts.

Explanations: In computer networking, a client is a device or software that connects to a server to request and receive services or data. This definition aligns with the correct answer, as it specifies that a client is a device that connects to a server.

Option Analysis:

Option A: This option is incorrect because it describes a client in a business context, not a technical one.
Option B: This option is correct as it accurately describes a client in the context of computer networking.
Option C: This option is incorrect because it describes a client in a business context, not a technical one.
Option D: This option is incorrect as it describes a device used by a hacker, which is unrelated to the technical definition of a client.

1618. The speed mismatch between the sender and receiver is called .....

Correct Answer: Correct answer is: (C) Flow Control.

Exam Relevance: Computer Networks, Data Communication, Network Fundamentals

Difficulty: Moderate

Concept notes: Flow control is a mechanism used to manage the rate of data transmission between a sender and a receiver to prevent overflow and ensure smooth data flow.

Common Mistakes: Students often confuse flow control with error control, which is a different mechanism that deals with detecting and correcting errors in data transmission.

Explanations: Flow control addresses the speed mismatch between the sender and receiver. It ensures that the sender does not overwhelm the receiver with data, which could lead to data loss or buffer overflow. By regulating the rate of data transmission, flow control maintains the integrity of the communication process.

Option Analysis:

Option A: Error control is not related to speed mismatch but rather to detecting and correcting errors in data transmission.
Option B: Speed control is not a standard term in data communication and does not specifically address the speed mismatch issue.
Option C: Flow control is the correct term for managing the rate of data transmission to prevent overflow and ensure smooth data flow.
Option D: Transmission control is a broader term that encompasses various mechanisms including flow control, but it is not specific to speed mismatch.

Mnemonic: Flow Control: "Flow" for "Flow" of data, "Control" for managing the rate.

1619. A family of 4 lives in a semi-detached house. They have a large number of devices used to connect to the internet. These include computers, laptops, mobile phones, tablets, and smart TVs. The family enjoys online shopping, playing online games, and streaming online TV. What would be the best type of network to use in this situation?

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

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

Difficulty: Moderate

Concept notes: Wireless networks are more convenient and flexible for households with multiple devices and users who move around the house.

Common Mistakes: Students might mistakenly think a wired network is better because it is perceived as more reliable, but this overlooks the convenience and mobility of wireless networks.

Explanations: A wireless network is the best choice for a family with multiple devices and users who engage in various online activities. Wireless networks provide flexibility and mobility, allowing devices to connect from any room in the house without the need for physical cables. This is particularly beneficial for a semi-detached house where users may move around frequently. Additionally, wireless networks can support a large number of devices, making it suitable for a family with multiple computers, laptops, mobile phones, tablets, and smart TVs.

Option Analysis:

Option A: Wired networks require physical cables, which can be cumbersome and limit mobility. They are less practical for a household with multiple devices and users who move around the house.
Option B: Wireless networks offer flexibility and mobility, making them ideal for a family with multiple devices and users who engage in various online activities.

Mnemonic: WIRELESS = Wide Range, Internet Everywhere, Reliable, Light, Simple

1620. What do you call an approach to computer networking where all computers show equivalent responsibility for processing data?

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

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Easy

Concept notes: In a peer-to-peer network, all computers have equal responsibility for processing data and sharing resources.

Common Mistakes: Students may confuse peer-to-peer with client-server, where one computer acts as the server and others as clients.

Explanations: In a peer-to-peer network, each computer (or peer) can act as both a client and a server, sharing resources and processing data equally. This contrasts with a client-server model where one or more dedicated servers handle the processing and resource sharing.

Option Analysis:

Option A: Client-server is incorrect because in this model, one or more dedicated servers handle the processing and resource sharing, not all computers equally.
Option B: Peer to peer is correct because it describes a network where all computers have equal responsibility for processing data and sharing resources.
Option C: Peer to client is not a standard networking model and does not accurately describe a network where all computers have equal responsibility.
Option D: None of the options is incorrect because peer to peer is a valid and well-defined networking model.

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Computer networking MCQ - Set 162

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