Computer networking MCQ – Change your future

461. An IP address...

Correct Answer: Correct answer is: (A) Can be routable (global) or non-routable (local).

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

Difficulty: Moderate

Concept notes: IP addresses can be categorized as routable (global) or non-routable (local) based on their ability to traverse the internet.

Common Mistakes: Students often mistakenly believe that all IP addresses are routable and can be accessed directly over the internet.

Explanations: IP addresses are used to uniquely identify devices on a network. Routable IP addresses, also known as global IP addresses, can be accessed over the internet. Non-routable IP addresses, also known as local IP addresses, are used within private networks and cannot be accessed directly over the internet. This distinction is important for network security and efficient use of IP address space.

Option Analysis:

Option A: Correct. IP addresses can be either routable (global) or non-routable (local).
Option B: Incorrect. While IP addresses are unique within a network, they are not necessarily unique for every computer in the world due to the use of private IP addresses.
Option C: Incorrect. IP addresses are not sold by Microsoft or any other entity; they are assigned by Internet Service Providers (ISPs) or network administrators.
Option D: Incorrect. IP addresses are not permanently stamped on network interface cards; they can be dynamically assigned or changed.

Mnemonic: Routable = Reachable, Non-routable = Not Reachable

462. WAN stands for

Correct Answer: Correct answer is: (A) Wide area network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Very Easy

Concept notes: WAN stands for Wide Area Network, which is a computer network that extends over a large geographical area.

Common Mistakes: Students may confuse WAN with the World Wide Web (WWW), which is a system of interlinked hypertext documents accessed via the Internet.

Explanations: WAN stands for Wide Area Network, which is a network that covers a broad area, such as a city, country, or even globally. It connects various LANs (Local Area Networks) and can be used to connect different offices of a company or different branches of a bank. The World Wide Web (WWW) is a different concept, referring to the collection of web pages and resources that can be accessed via the Internet.

Option Analysis:

Option A: Correct. WAN stands for Wide Area Network.
Option B: Incorrect. World Wide Web (WWW) is a different concept, referring to the collection of web pages and resources accessible via the Internet.
Option C: Incorrect. LAN stands for Local Area Network, which is a network that connects computers within a limited area such as a residence, school, or office building.

Mnemonic: WAN - Wide Area Network

463. All nodes are connected to a single backbone cable.

Correct Answer: Correct answer is: (D) Bus Topology.

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

Difficulty: Easy

Concept notes: In a bus topology, all nodes are connected to a single backbone cable, which serves as the main communication line.

Common Mistakes: Students may confuse bus topology with ring topology, where nodes are connected in a circular loop.

Explanations: In a bus topology, all devices are connected to a single central cable, known as the backbone. This backbone cable acts as a shared communication medium, allowing data to be transmitted from one device to another. This configuration matches the description given in the question.

Option Analysis:

Option A: In a star topology, all nodes are connected to a central hub, not a backbone cable.
Option B: In a mesh topology, each node is connected to several other nodes, not a single backbone cable.
Option C: In a ring topology, nodes are connected in a circular loop, not to a single backbone cable.
Option D: In a bus topology, all nodes are connected to a single backbone cable, which matches the description in the question.

Mnemonic: Bus = Backbone, Single, Shared

464. 168.10.3 is an example of...?

Correct Answer: Correct answer is: (D) IP Address.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: An IP address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.

Common Mistakes: Students may confuse IP addresses with physical addresses or MAC addresses.

Explanations: 168.10.3 is an example of an IP address. IP addresses are used to uniquely identify devices on a network. The format 168.10.3 suggests it is part of a larger IP address, likely in the form of 192.168.10.3, which is a common format for private IP addresses used in local networks.

Option Analysis:

Option A: House Address is incorrect because it refers to a physical location, not a network identifier.
Option B: Computer ID is incorrect because it typically refers to a unique identifier assigned to a computer, not an IP address.
Option C: Local Area Network Address is partially correct but too broad; IP addresses are used in LANs but not all LAN addresses are IP addresses.
Option D: IP Address is correct because 168.10.3 is part of an IP address format used in networks.

Mnemonic: IP for Internet Protocol, like a phone number for the internet.

465. Bandwidth is the:

Correct Answer: Correct answer is: (B) Difference between the highest and lowest frequencies that can be accommodated on a single channel.

Exam Relevance: GATE, ECE, EE

Difficulty: Easy

Concept notes: Bandwidth is defined as the range of frequencies that can be transmitted over a communication channel.

Common Mistakes: Students often confuse bandwidth with the number of cycles per second, which is actually frequency.

Explanations: Bandwidth is the range of frequencies that can be transmitted over a communication channel. It is calculated as the difference between the highest and lowest frequencies that can be accommodated on a single channel. This definition aligns with the correct answer provided.

Option Analysis:

Option A: This describes frequency, not bandwidth.
Option B: This correctly defines bandwidth as the range of frequencies.
Option C: This is not a correct definition of bandwidth.
Option D: This describes the geographical span of a network, not bandwidth.

466. Two or more topologies are combined to form a complete network.

Correct Answer: Correct answer is: (A) TREE / HYBRID TOPOLOGY.

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

Difficulty: Moderate

Concept notes: Hybrid topologies combine two or more basic network topologies to form a more complex network structure.

Common Mistakes: Students may confuse hybrid topologies with mesh topologies, which are fully interconnected networks.

Explanations: Hybrid topologies are formed by combining two or more basic network topologies, such as star, bus, ring, or mesh. This combination allows for the creation of a network that can leverage the strengths of each individual topology. For example, a tree topology is a hybrid that combines star and bus topologies. Therefore, the correct answer is (A) TREE / HYBRID TOPOLOGY.

Option Analysis:

Option A: Correct. Tree topology is a hybrid topology that combines star and bus topologies.
Option B: Incorrect. Mesh topology is a fully interconnected network and does not combine other topologies.
Option C: Incorrect. Star topology is a basic topology and does not combine other topologies.

Mnemonic: Tree combines, mesh doesn't.

467. A computer network can share printers and software.

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

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

Difficulty: Easy

Concept notes: A computer network allows multiple computers to share resources such as printers and software.

Common Mistakes: Students might think that each computer needs its own printer and software, not realizing the benefits of networked resources.

Explanations: In a computer network, devices can share hardware resources like printers and software applications. This sharing reduces costs and increases efficiency by allowing multiple users to access the same resources without needing individual copies.

Option Analysis:

Option A: Correct. A network can share printers and software among connected devices.
Option B: Incorrect. This would imply that sharing resources is not possible in a network, which is false.

468. What is fibre optics used for?

Correct Answer: Correct answer is: (B) Transmitting data over long distances, quickly.

Exam Relevance: GATE, GRE, ECE exams

Difficulty: Moderate

Concept notes: Fibre optics is a technology that uses thin, flexible strands of glass or plastic to transmit data using light. This technology is particularly effective for long-distance communication due to its high bandwidth and low signal loss over distance.

Common Mistakes: Students may mistakenly believe that fibre optics is only used for short-distance data transmission or for decorative purposes, such as Christmas lights.

Explanations: Fibre optics is used for transmitting data over long distances quickly because it can carry large amounts of data with minimal signal degradation. The light signals travel through the fibre with very little loss, making it ideal for long-distance communication. This technology is widely used in telecommunications and internet infrastructure to connect cities, countries, and continents.

Option Analysis:

Option A: Fibre optics is not typically used for Christmas decorations. Decorative lights use traditional electrical wiring.
Option B: This is the correct answer. Fibre optics is used for transmitting data over long distances quickly due to its high bandwidth and low signal loss.
Option C: While fibre optics can be used in LANs, it is not specifically noted for this use. It is more commonly associated with long-distance communication.
Option D: Fibre optics is not limited to short distances. Its primary advantage is its ability to transmit data over long distances with high speed and low loss.

Mnemonic: Fibre optics: Light travels far, fast, and bright.

469. A positive of a wireless network is

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

Exam Relevance: Network Security Exams, Computer Science Exams, IT Certification Exams

Difficulty: Easy

Concept notes: A positive aspect of a wireless network is its flexibility, which allows users to move around while maintaining network connectivity.

Common Mistakes: Students may confuse flexibility with security, thinking that wireless networks are inherently secure, which is not true.

Explanations: Wireless networks provide users with the ability to connect to the network from various locations without being tethered to a physical cable. This flexibility is a significant advantage, as it allows for mobility and ease of use in various environments.

Option Analysis:

Option A: Flexibility is a key advantage of wireless networks, as it allows users to move around freely while staying connected.
Option B: Security is not a positive aspect of wireless networks; in fact, wireless networks can be more vulnerable to security threats compared to wired networks.
Option C: The ability for anyone to log in is not a positive aspect; it can lead to unauthorized access and security issues.
Option D: While wireless networks can cover a large geographic area, this is not necessarily a positive aspect and can vary based on the network's configuration and technology.

470. Which one of the following statements referring to mobile Internet access is FALSE?

Correct Answer: Correct answer is: (D) A USB modem looks like a flash disk and operates without a SIM card.

Exam Relevance: GATE, GRE, GMAT, IT Certification Exams

Difficulty: Easy

Concept notes: A USB modem, also known as an Internet dongle, is a device that allows a computer to connect to the Internet via a mobile network. It typically resembles a flash drive in appearance.

Common Mistakes: Students may mistakenly believe that a USB modem can operate without a SIM card, similar to a regular flash drive.

Explanations: A USB modem requires a SIM card to connect to a mobile network and access the Internet. The SIM card contains the necessary information to authenticate the device on the network. Without a SIM card, the USB modem cannot establish a connection to the mobile network and thus cannot provide Internet access.

Option Analysis:

Option A: This statement is true. A 3G/4G network is indeed a high-speed data network used by mobile network providers for broadband services and Internet access.
Option B: This statement is true. A USB modem or Internet dongle is a device that connects to a 3G/4G network to provide Internet access.
Option C: This statement is true. 3G stands for Third Generation and 4G for Fourth Generation, referring to the generations of mobile network technology.
Option D: This statement is false. A USB modem does look like a flash disk, but it requires a SIM card to operate and connect to the mobile network.

Mnemonic: USB SIM, Not Just a Stick

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Computer networking MCQ - Set 47

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