Computer networking MCQ – Change your future

831. An adhoc network cannot send data to other

Correct Answer: Correct answer is: (A) Basic service set.

Exam Relevance: Computer Networks, Wireless Communication, Network Security

Difficulty: Moderate

Concept notes: An ad hoc network is a decentralized type of wireless network where devices communicate directly with each other without the need for a central access point or infrastructure.

Common Mistakes: Students may confuse ad hoc networks with infrastructure-based networks, where communication is facilitated through an access point.

Explanations: An ad hoc network cannot send data to a basic service set (BSS) because a BSS is a part of an infrastructure-based network, which includes an access point. Ad hoc networks operate independently and do not rely on such infrastructure.

Option Analysis:

Option A: Correct. An ad hoc network cannot send data to a basic service set (BSS) because BSS is part of an infrastructure-based network.
Option B: Incorrect. An extended service set (ESS) is a collection of BSSs, and ad hoc networks do not interact with ESS.
Option C: Incorrect. An access point is a component of an infrastructure-based network, not an ad hoc network.
Option D: Incorrect. Distributed function is not a specific network component and does not apply to the context of ad hoc networks.

832. You have shared printers and scanners centrally in a Computer network, what is it called?

Correct Answer: Correct answer is: (B) Recourse sharing.

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

Difficulty: Easy

Concept notes: Recourse sharing refers to the practice of sharing resources, such as printers and scanners, across a network.

Common Mistakes: Students may confuse recourse sharing with data sharing, which involves sharing files and information rather than hardware.

Explanations: Recourse sharing is the correct term for sharing hardware resources like printers and scanners in a network. This term encompasses the idea of sharing any type of resource, including hardware devices, which is why it is the appropriate answer in this context.

Option Analysis:

Option A: Data sharing refers to the sharing of files and information, not hardware devices.
Option B: Recourse sharing is the correct term for sharing hardware resources like printers and scanners in a network.
Option C: Device sharing is a more specific term and does not encompass all types of shared resources.
Option D: Hardware sharing is a specific type of recourse sharing but is not the most comprehensive term.

Mnemonic: R - Recourse, R - Resources, S - Sharing

833. Collection of network or networks is called

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: The Internet is a global network of interconnected computer networks that communicate using the standard Internet Protocol (IP).

Common Mistakes: Students may confuse the Internet with an Intranet, which is a private network used within an organization.

Explanations: The Internet is the collection of interconnected networks that allow computers and devices worldwide to communicate with each other. It is a global network that connects various smaller networks, including private networks, public networks, and other types of networks. This makes the Internet the correct answer as it represents the collection of networks.

Option Analysis:

Option A: Intranet is a private network used within an organization, not a collection of networks.
Option B: Internet is the correct term for a collection of interconnected networks.
Option C: Extranet is a private network that allows secure connections to specific external users, not a collection of networks.
Option D: LAN (Local Area Network) is a network that connects computers within a limited area, not a collection of networks.

834. What is a Default gateway used to identify?

Correct Answer: Correct answer is: (A) Identifies the device that the computer uses to access theInternet or another network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Easy

Concept notes: A default gateway is a device, typically a router, that serves as the point of departure for network traffic destined for outside networks.

Common Mistakes: Students may confuse the default gateway with the IP address of the network itself or the IP address of the computer.

Explanations: The default gateway is the device that a computer uses to send data to other networks when the destination is not on the local network. It is essential for connecting to the Internet or other external networks.

Option Analysis:

Option A: Correct. The default gateway is the device that routes traffic to other networks.
Option B: Incorrect. The network identifier is used to identify the network, not the gateway.
Option C: Incorrect. The computer's IP address identifies the computer on the network, not the gateway.
Option D: Incorrect. This is not the correct answer as Option A is correct.

835. In case of time exceeded error, when the datagram visits a router, the value of time to live field is

Correct Answer: Correct answer is: (D) Decremented by 1.

Exam Relevance: CCNA, CISSP, Network+, CompTIA Security+

Difficulty: Easy

Concept notes: The time to live (TTL) field in an IP datagram is decremented by 1 each time the datagram passes through a router. If the TTL reaches zero, the datagram is discarded and an ICMP Time Exceeded message is sent back to the source.

Common Mistakes: A common mistake is to think that the TTL value remains constant or changes by more than 1 per router hop.

Explanations: The TTL field in an IP datagram is designed to prevent datagrams from circulating indefinitely in a network. Each time a datagram passes through a router, the TTL value is decremented by 1. If the TTL value reaches zero, the datagram is discarded, and a Time Exceeded error is generated. This ensures that packets do not endlessly loop in the network, causing congestion.

Option Analysis:

Option A: The TTL value does not remain constant; it is decremented by 1 at each router.
Option B: The TTL value is not decremented by 2; it is decremented by 1 at each router.
Option C: The TTL value is not incremented; it is decremented by 1 at each router.
Option D: The TTL value is decremented by 1 at each router, which is the correct behavior.

836. UDP is used for management processes such as

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: SNMP (Simple Network Management Protocol) is a protocol used for managing and monitoring network devices. It uses UDP for communication because UDP is connectionless and faster than TCP, making it suitable for management processes that do not require the overhead of a connection-oriented protocol.

Common Mistakes: Students often confuse SNMP with other protocols like SMTP or TCP/IP, which are not specifically designed for network management.

Explanations: SNMP is used for network management processes because it is designed to efficiently monitor and manage network devices. UDP is used in SNMP because it is a lightweight, connectionless protocol that provides fast communication, which is essential for network management tasks. This makes SNMP a suitable choice for managing and monitoring network devices.

Option Analysis:

Option A: SMTP is a protocol used for sending and receiving email, not for network management.
Option B: TCP/IP is a suite of protocols used for communication over the internet, not specifically for network management.
Option C: SNMP is a protocol used for managing and monitoring network devices, and it uses UDP for communication.
Option D: TCP is a connection-oriented protocol used for reliable data transfer, not specifically for network management.

837. A system with 8-bit addresses has address space of

Correct Answer: Correct answer is: (B) 256.

Exam Relevance: Computer Architecture, Digital Logic, Computer Organization

Difficulty: Easy

Concept notes: An 8-bit address space can represent 2^8 unique addresses.

Common Mistakes: Students may confuse the number of bits with the number of possible addresses, leading to incorrect calculations.

Explanations: An 8-bit address space means each address is represented by 8 bits. Since each bit can be either 0 or 1, the total number of unique addresses is 2^8, which equals 256.

Option Analysis:

Option A: 32 is incorrect because it does not account for the full range of 8-bit addresses.
Option B: 256 is correct as it represents the total number of unique addresses in an 8-bit system.
Option C: 720 is incorrect and does not relate to the calculation of 8-bit addresses.
Option D: 65535 is incorrect as it represents the number of unique addresses in a 16-bit system, not an 8-bit system.

Mnemonic: 8 bits, 2 to the 8th, 256.

838. Google, Bing, Lycos, and Yahoo are all examples of.....

Correct Answer: Correct answer is: (B) Search Engines.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Search engines are web-based tools that help users find information on the internet by indexing and searching through web pages.

Common Mistakes: Students may confuse search engines with browsers, which are software applications used to access and navigate the internet.

Explanations: Google, Bing, Lycos, and Yahoo are all examples of search engines because they allow users to search for and retrieve information from the internet. They are not languages, browsers, or IP addresses.

Option Analysis:

Option A: Languages are systems of communication, not tools for searching the internet.
Option B: Search engines are tools that help users find information on the internet.
Option C: Browsers are software applications used to access and navigate the internet, not search for information.
Option D: IP addresses are numerical labels assigned to devices on a network, not tools for searching the internet.

839. To use proxy server, client must be configured to access proxy instead of the

Correct Answer: Correct answer is: (B) Target Server.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: To use a proxy server, the client must be configured to send requests to the proxy server instead of directly to the target server.

Common Mistakes: A common mistake is to think that the client should be configured to access the proxy server instead of the original server, which is a misunderstanding of the term "original server" in this context.

Explanations: When a client is configured to use a proxy server, it sends all its requests to the proxy server. The proxy server then forwards these requests to the target server on behalf of the client. This configuration ensures that the client does not directly communicate with the target server, which can be useful for security, caching, or filtering purposes.

Option Analysis:

Option A: Incorrect. The client is already using the proxy server, so it does not need to access another proxy server.
Option B: Correct. The client must be configured to send requests to the proxy server instead of the target server.
Option C: Incorrect. The domain server is not relevant in this context of proxy server configuration.
Option D: Incorrect. The term "original server" is ambiguous and does not accurately describe the target server in this context.

Mnemonic: Proxy = Pass Through

840. The inner core of an optical fiber is.....

Correct Answer: Correct answer is: (B) Glass or plastic.

Exam Relevance: Physics Olympiad, AP Physics, IB Physics

Difficulty: Easy

Concept notes: The inner core of an optical fiber is made of glass or plastic to allow light to travel through it with minimal loss.

Common Mistakes: Students may mistakenly think the core is made of metal, like copper, because they are familiar with metal wires used in electrical cables.

Explanations: The inner core of an optical fiber is made of glass or plastic because these materials allow light to travel through them efficiently. Glass and plastic are transparent and have the necessary refractive index properties to guide light along the fiber using total internal reflection. Copper, liquid, and bimetallic materials do not have these properties and would not allow light to travel effectively.

Option Analysis:

Option A: Copper is not suitable for the core of an optical fiber because it does not allow light to travel through it efficiently.
Option B: Glass or plastic is the correct material for the core of an optical fiber as it allows light to travel through it with minimal loss.
Option C: Liquid is not suitable for the core of an optical fiber because it cannot maintain the necessary shape and refractive index properties.
Option D: Bimetallic materials are not suitable for the core of an optical fiber because they do not allow light to travel through them efficiently.

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Computer networking MCQ - Set 84

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