Computer networking MCQ

1471. Supplies networking capability to a group of computers in close proximity to each other such as in an office building, a school, or a home

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

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

Difficulty: Easy

Concept notes: A Local Area Network (LAN) connects computers and devices within a limited geographical area, such as an office building, school, or home.

Common Mistakes: Students may confuse LAN with other types of networks like WAN or MAN, which cover larger geographical areas.

Explanations: LANs are designed to provide networking capabilities to a group of computers in close proximity. This makes them suitable for environments like office buildings, schools, or homes where devices are located within a small area. The other network types (MAN, WAN, PAN) cover different geographical ranges and are not as appropriate for the described scenario.

Option Analysis:

Option A: Correct. LANs are designed for close proximity networking, fitting the description.
Option B: Incorrect. MANs cover a larger area, such as a city or town, not a single building or home.
Option C: Incorrect. WANs cover very large areas, such as countries or continents, not a single building or home.
Option D: Incorrect. PANs are for very short distances, typically within a few meters, not for connecting multiple devices in a building.

Mnemonic: LAN: Local Area Network, Local to a single location.

1472. A group of two or more computers connected so they can communicate, share resources and exchange information with one another.

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

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

Difficulty: Easy

Concept notes: A network is a group of two or more computers connected so they can communicate, share resources, and exchange information with one another.

Common Mistakes: Students may confuse a network with a network server, which is a computer system that manages network resources.

Explanations: A network is defined as a group of two or more computers connected so they can communicate, share resources, and exchange information with one another. This matches the description given in the question. A network server, ARPA, and the Internet do not fit this specific definition.

Option Analysis:

Option A: A network server is a computer system that manages network resources, not a group of computers connected for communication.
Option B: A network is a group of two or more computers connected for communication, sharing resources, and exchanging information.
Option C: ARPA (Advanced Research Projects Agency) is an organization, not a group of connected computers.
Option D: The Internet is a global network of networks, not a specific group of connected computers as described.

1473. Good passwords are...

Correct Answer: Correct answer is: (A) Easy to remember, hard to guess.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Good passwords should be memorable to the user but difficult for others to guess.

Common Mistakes: Students may think that overly complex passwords are always better, but this can lead to forgetting the password.

Explanations: A good password strikes a balance between being easy for the user to remember and hard for others to guess. This ensures that the user can recall the password without writing it down, while also providing sufficient security against unauthorized access.

Option Analysis:

Option A: This is the correct choice as it balances memorability and security.
Option B: While complexity can enhance security, overly complicated passwords can be hard to remember, leading to potential security risks.
Option C: Short passwords are often too easy to guess, compromising security.
Option D: Passwords made only of punctuation and numbers can be hard to remember and may not be as secure as a mix of characters.

Mnemonic: EASY-TO-REMEMBER, HARD-TO-GUESS

1474. Which device connetcs a LAN to another LAN that uses the same protocol?

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

Exam Relevance: CCNA, Network+, CompTIA Network+

Difficulty: Moderate

Concept notes: A bridge connects two LANs that use the same protocol by operating at the data link layer (Layer 2) of the OSI model.

Common Mistakes: Students often confuse bridges with routers, which operate at the network layer (Layer 3) and can connect different types of networks.

Explanations: A bridge is used to connect two LANs that use the same protocol. It operates at the data link layer (Layer 2) of the OSI model, which means it can filter and forward frames based on MAC addresses. This makes it suitable for connecting LANs that use the same protocol, as it does not need to perform protocol conversion or routing functions.

Option Analysis:

Option A: A router operates at the network layer (Layer 3) and is used to connect different types of networks, not just LANs with the same protocol.
Option B: A gateway operates at multiple layers of the OSI model and is used to connect networks with different protocols, not just LANs with the same protocol.
Option C: A bridge operates at the data link layer (Layer 2) and is used to connect two LANs that use the same protocol.
Option D: A switch is also a Layer 2 device, but it is used to connect multiple devices within a single LAN, not to connect two separate LANs.

Mnemonic: Bridge = Same Protocol LANs

1475. Which is an advantage of a computer network.

Correct Answer: Correct answer is: (B) Devices can communicate easily e.g Instant messaging.

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

Difficulty: Easy

Concept notes: A computer network allows devices to communicate with each other, facilitating the exchange of data and information.

Common Mistakes: Students may confuse the benefits of a network with physical sharing, such as electricity, which is not a function of a computer network.

Explanations: A computer network enables devices to communicate easily, allowing for instant messaging, file sharing, and other forms of data exchange. This is a fundamental advantage of networking, as it enhances collaboration and efficiency among connected devices.

Option Analysis:

Option A: Devices cannot share electricity through a computer network. This is a physical impossibility and unrelated to network functionality.
Option B: This is correct. Devices can communicate easily through a network, enabling instant messaging and other forms of communication.
Option C: While sharing printers is possible in a network, it is not an inherent advantage of networking. Each device having its own printer is not a network benefit.
Option D: Each device having its own hard drive is not an advantage of a network. Networked devices can share storage resources, but this is not the primary benefit.

1476. Wired transmission media is ..... and wireless transmission media is .....

Correct Answer: Correct answer is: (A) The transfer of data along tangible channels from one point to the other.

Exam Relevance: Networking exams, Computer Science exams, Telecommunications exams

Difficulty: Easy

Concept notes: Wired transmission media refers to physical channels used for data transmission, such as cables and wires.

Common Mistakes: Students may confuse wired transmission with wireless transmission, which does not use physical channels.

Explanations: Wired transmission media involves the use of tangible channels, such as copper wires or fiber optic cables, to transfer data from one point to another. This is in contrast to wireless transmission media, which uses signal waves like radio waves or microwaves for data transfer without physical connections.

Option Analysis:

Option A: This option correctly defines wired transmission media as the transfer of data along tangible channels.
Option B: This option is incorrect as it specifically mentions fiber optic cables, which is a type of wired transmission but not the general definition.
Option C: This option incorrectly defines wireless transmission media, not wired transmission media.
Option D: This option incorrectly defines wireless transmission media, specifically using microwave signals, which is not the general definition of wired transmission media.

Mnemonic: Wired = Wires, Wireless = Waves

1477. Which of the following is NOT an example of an advantage of having a computer network?

Correct Answer: Correct answer is: (D) Vulnerability of Viruses.

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

Difficulty: Easy

Concept notes: A computer network provides various advantages such as shared resources like printers, storage, applications, and databases. However, vulnerability to viruses is a disadvantage, not an advantage.

Common Mistakes: Students might confuse the disadvantages of a network with its advantages.

Explanations: Computer networks allow multiple users to share resources such as printers, storage space, applications, and databases, which are all advantages. In contrast, vulnerability to viruses is a security risk and a disadvantage of having a network.

Option Analysis:

Option A: Shared printing is an advantage of a network, as it allows multiple users to access a single printer.
Option B: Shared storage space is an advantage, as it allows users to access and share files from a central location.
Option C: Shared Applications and Databases are advantages, as they allow multiple users to access and use the same software and data resources.
Option D: Vulnerability of Viruses is not an advantage; it is a disadvantage as it poses a security risk to the network.

1478. Which if these terms refers to the maximum rate at which data can be transferred?

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

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: Bandwidth refers to the maximum rate at which data can be transferred over a network or communication channel.

Common Mistakes: Students may confuse bandwidth with other network terms such as latency or throughput.

Explanations: Bandwidth is the correct term for the maximum rate at which data can be transferred. It defines the capacity of a communication channel to transmit data in a given time period, typically measured in bits per second (bps).

Option Analysis:

Option A: Error detection is a method used to identify errors in data transmission, not a measure of data transfer rate.
Option B: Packet switching is a method of data transmission where data is divided into packets and sent over a network, not a measure of data transfer rate.
Option C: Bandwidth is the correct term for the maximum rate at which data can be transferred.
Option D: Transmission media refers to the physical medium used to transmit data, not a measure of data transfer rate.

1479. A wide area network (WAN) ...

Correct Answer: Correct answer is: (A) Connects two or more LANs together.

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

Difficulty: Easy

Concept notes: A wide area network (WAN) is a network that spans a large geographical area, often connecting multiple local area networks (LANs) together.

Common Mistakes: Students may confuse WAN with Wi-Fi, which is a wireless technology used for local area networking.

Explanations: A WAN connects two or more LANs together, allowing for communication and data transfer over a larger geographical area. This is the primary function of a WAN, making it distinct from other network types like LANs, which are confined to a smaller area.

Option Analysis:

Option A: Correct. WANs connect multiple LANs over a large geographical area.
Option B: Incorrect. WAN does not specifically mean Wi-Fi can be used.
Option C: Incorrect. Ease of use is subjective and not a defining characteristic of WANs.
Option D: Incorrect. Connecting two or more computers together is a function of LANs, not WANs.

Mnemonic: WAN: Wide Area Network, connects LANs.

1480. Which of the following networking cable category is the most commonly used?

Correct Answer: Correct answer is: (B) Cat 5 and 5e.

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

Difficulty: Moderate

Concept notes: Cat 5 and 5e cables are widely used in networking due to their balance of performance and cost.

Common Mistakes: Students may confuse Cat 5 and Cat 5e, thinking they are the same, but Cat 5e offers improved performance.

Explanations: Cat 5 and Cat 5e cables are the most commonly used in networking because they provide a good balance between performance and cost. Cat 5e, an enhanced version of Cat 5, offers better performance with reduced crosstalk and improved data transmission rates, making it a preferred choice for modern networks.

Option Analysis:

Option A: Cat3 cables are older and less commonly used today due to their lower bandwidth capabilities.
Option B: Cat 5 and 5e are widely used for their balance of performance and cost.
Option C: Cat 5 is part of the correct answer, but Cat 5e is also included for its enhanced performance.
Option D: Cat 6 cables offer higher performance but are more expensive and not as commonly used as Cat 5 and 5e.

Mnemonic: 5e for enhanced, 5 for basic.

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Computer networking MCQ - Set 148

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