Computer networking MCQ – Change your future

531. Q8: What is cloud computing? (1-4)

Correct Answer: Correct answer is: (B) Using the internet to access data and programs remotely.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Cloud computing involves using the internet to access data and programs stored on remote servers.

Common Mistakes: Students may confuse cloud computing with storing data on a single computer or using the internet for communication.

Explanations: Cloud computing allows users to access data and programs over the internet, which means they can use applications and store data on remote servers rather than on local hardware. This enables users to access their data and applications from anywhere with an internet connection, enhancing flexibility and scalability.

Option Analysis:

Option A: Storing large amounts of data on a single computer is not cloud computing; it is local storage.
Option B: Using the internet to access data and programs remotely is the correct definition of cloud computing.
Option C: Storing hard copies of data as a backup is not related to cloud computing; it is a form of physical data storage.
Option D: Using the internet to communicate with other users is not cloud computing; it is a form of online communication.

Mnemonic: Clouds float, so data floats on the internet.

532. Which of these best describes a network?

Correct Answer: Correct answer is: (C) A series of connected computer devices.

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

Difficulty: Easy

Concept notes: A network is defined as a group of devices connected together to share resources and communicate with each other.

Common Mistakes: Students may confuse a network with a collection of independent devices, not recognizing the importance of connectivity.

Explanations: A network involves devices that are interconnected, allowing them to communicate and share resources. This connectivity is the defining feature of a network, distinguishing it from a collection of unconnected or independent devices.

Option Analysis:

Option A: Incorrect because a network requires devices to be connected, not unconnected.
Option B: Incorrect because independent devices do not form a network; they must be connected.
Option C: Correct because a network is characterized by connected devices that can communicate and share resources.

533. What moves around the Telephone cable network?

Correct Answer: Correct answer is: (C) Information (Voice calls).

Exam Relevance: SAT, ACT, AP Physics, GCE A-Level

Difficulty: Easy

Concept notes: In a telephone cable network, the primary function is to transmit information, specifically voice calls.

Common Mistakes: Students may mistakenly think that physical objects like trains or buses move through the network.

Explanations: A telephone cable network is designed to transmit information, such as voice calls, through electrical signals. The cables carry these signals from one point to another, enabling communication between different locations. Trains and buses do not move through telephone cables as they are physical transportation methods and not part of the telecommunication infrastructure.

Option Analysis:

Option A: Trains do not move through telephone cables; they are a form of transportation on tracks.
Option B: Buses do not move through telephone cables; they are a form of transportation on roads.
Option C: Information, such as voice calls, is transmitted through telephone cables.

534. The following are the disadvantages of Ring topology except one:

Correct Answer: Correct answer is: (D) Difficult to isolate network faults.

Exam Relevance: Computer Networks, Data Communication, Network Fundamentals

Difficulty: Moderate

Concept notes: In a ring topology, network faults can be relatively easy to isolate because the failure often disrupts the circular path of data, making the faulty node or segment identifiable.

Common Mistakes: Students may mistakenly believe that isolating faults in a ring topology is difficult due to the circular nature of the network, but this is not the case as disruptions are often clear.

Explanations: In a ring topology, data travels in a circular path from one device to the next. When a fault occurs, it typically disrupts this path, making the faulty segment or node identifiable. This makes isolating network faults relatively straightforward compared to other topologies where faults might be harder to pinpoint.

Option Analysis:

Option A: Ring topology requires a specific type of wiring to maintain the circular path, which can be costly.
Option B: Connecting devices in a ring topology can be more complex due to the need to maintain the circular path.
Option C: Adaptor cards for ring topology may be more expensive due to the specialized hardware required.
Option D: Fault isolation in a ring topology is not difficult because disruptions in the circular path are easily identifiable.

Mnemonic: Ring Faults: "Ring Disruption, Easy Spot"

535. So, what is the backbone?

Correct Answer: Correct answer is: (A) Central network traffic infrastructure, that connects different network.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The backbone of a network refers to the central infrastructure that connects different networks together, forming a larger network.

Common Mistakes: Students may confuse the backbone with other network components like local area networks (LANs) or the internet itself.

Explanations: The backbone is the central network traffic infrastructure that connects different networks. It is responsible for providing the main pathways for data transmission between these networks. This infrastructure is crucial for ensuring that data can travel efficiently and reliably across a wide area network (WAN). The backbone typically consists of high-speed links and routers that manage the flow of data between different networks.

Option Analysis:

Option A: This is the correct definition of a network backbone. It is the central infrastructure that connects different networks.
Option B: This describes the internet, which is a global network of computers, but not specifically the backbone of a network.
Option C: This describes a router or a switch, which are network devices but not the backbone itself.
Option D: This describes a local area network (LAN), which is a network within a single building or small area, not the backbone.

Mnemonic: Backbone = Big Connect

536. In class C , if subnet mask is 255.255.255.224 then calculates number of subnet?

Correct Answer: Correct answer is: (B) 8.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The subnet mask 255.255.255.224 indicates that the last octet is used for subnetting. The number of subnets can be calculated by determining how many bits are used for subnetting in the last octet.

Common Mistakes: Students often confuse the number of subnets with the number of usable IP addresses per subnet.

Explanations: The subnet mask 255.255.255.224 means that the last octet is divided into 224, which is 11100000 in binary. This indicates that the first three bits are used for subnetting, and the remaining five bits are used for host addresses. The number of subnets is calculated as 2^3 = 8.

Option Analysis:

Option A: Incorrect, as 6 is not the correct number of subnets for the given subnet mask.
Option B: Correct, as 8 is the correct number of subnets for the given subnet mask.
Option C: Incorrect, as 4 is not the correct number of subnets for the given subnet mask.
Option D: Incorrect, as 8 is the correct number of subnets for the given subnet mask.

537. A Ring network is difficult to set up?

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

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Easy

Concept notes: A Ring network is a type of network topology where each node is connected to exactly two other nodes, forming a closed loop. This topology is relatively straightforward to set up and manage.

Common Mistakes: Students may mistakenly believe that Ring networks are complex due to the need for a continuous loop, but in reality, the setup process is quite simple.

Explanations: A Ring network is not difficult to set up because each node only needs to connect to two other nodes, forming a continuous loop. This simplicity makes it easier to configure and maintain compared to more complex topologies like Mesh networks.

Option Analysis:

Option A: Incorrect because Ring networks are not difficult to set up.
Option B: Correct because Ring networks are relatively simple to set up.
Option C: Incorrect because the correct answer is known and provided.

Mnemonic: Ring, Simple, Loop

538. One of my workstations has gone down and my entire network has gone down. Which topology am I using?

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

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

Difficulty: Moderate

Concept notes: In a ring topology, each device is connected to exactly two other devices, forming a closed loop. If one device fails, it can disrupt the entire network.

Common Mistakes: Students may confuse the ring topology with the bus topology, where a single cable connects all devices. In a bus topology, a failure in one device does not necessarily disrupt the entire network.

Explanations: In a ring topology, data travels in one direction around the loop. If one workstation fails, it breaks the loop, preventing data from circulating, thus causing the entire network to fail. This is why the correct answer is a ring topology.

Option Analysis:

Option A: Correct. In a ring topology, a single failure can disrupt the entire network.
Option B: Incorrect. In a star topology, a failure in one workstation does not affect the entire network, as each device is connected to a central hub.
Option C: Incorrect. In a bus topology, a failure in one workstation does not necessarily disrupt the entire network, as data can still travel along the bus cable to other devices.

Mnemonic: Ring = Round and Round, one break stops all.

539. Which network topology is this term describing? "Data is sent around a loop in the network until it reaches the destination"

Correct Answer: Correct answer is: (D) Ring.

Exam Relevance: CCNA, Network+ Certification, IT Essentials

Difficulty: Easy

Concept notes: In a ring topology, data travels in a circular path from one device to the next until it reaches its destination.

Common Mistakes: Students may confuse the ring topology with the bus topology, where data travels along a single cable.

Explanations: In a ring topology, data packets are sent around a loop. Each device on the network receives the data and checks if it is the intended recipient. If not, the data is passed to the next device in the loop. This process continues until the data reaches its destination. This is why the term "Data is sent around a loop in the network until it reaches the destination" accurately describes a ring topology.

Option Analysis:

Option A: In a mesh topology, each device is connected to every other device, allowing multiple paths for data transmission. This does not match the description of data traveling in a loop.
Option B: In a bus topology, all devices are connected to a single cable, and data travels along this cable to all devices. This does not match the description of data traveling in a loop.
Option C: In a star topology, all devices are connected to a central hub. Data travels from the source device to the hub and then to the destination device. This does not match the description of data traveling in a loop.
Option D: In a ring topology, data is sent around a loop in the network until it reaches the destination, which matches the given description.

Mnemonic: Ring = Round and Round

540. In a P2P network, all devices share the connection to the internet. True or False?

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

Exam Relevance: Computer Networks, Network Security, IT Fundamentals

Difficulty: Easy

Concept notes: In a Peer-to-Peer (P2P) network, all devices share the connection to the internet.

Common Mistakes: Students may confuse P2P networks with client-server networks, where only the server typically handles internet connections.

Explanations: In a P2P network, each device (peer) can directly communicate with other devices without the need for a central server. This means that all devices share the responsibility of maintaining the network and can share the internet connection. Therefore, the statement is true.

Option Analysis:

Option A: Correct. In a P2P network, all devices share the connection to the internet.
Option B: Incorrect. This would imply that not all devices share the internet connection, which is not the case in a P2P network.

Mnemonic: P2P: Peers Share

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Computer networking MCQ - Set 54

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