Computer networking MCQ – Change your future

401. Connection establishment in TCP is done by which mechanism?

Correct Answer: Correct answer is: (B) Three-Way Handshaking.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Easy

Concept notes: TCP (Transmission Control Protocol) uses a three-way handshake to establish a connection between two endpoints.

Common Mistakes: Students may confuse flow control with connection establishment, as both are mechanisms used in TCP but serve different purposes.

Explanations: TCP uses a three-way handshake to establish a connection. The process involves the following steps: 1. The initiating host sends a SYN (synchronize) packet to the receiving host. 2. The receiving host responds with a SYN-ACK (synchronize-acknowledge) packet. 3. The initiating host sends an ACK (acknowledge) packet to confirm the connection. This mechanism ensures that both hosts are ready to communicate before data transmission begins.

Option Analysis:

Option A: Flow control is a mechanism to prevent the sender from overwhelming the receiver with data, not for connection establishment.
Option B: Three-Way Handshaking is the correct mechanism for establishing a TCP connection.
Option C: Forwarding is a process in networking where packets are sent from one network to another, not for connection establishment.
Option D: Synchronisation is part of the three-way handshake but does not describe the entire process of connection establishment.

Mnemonic: SYN-ACK-ACK: Start Your Network, Acknowledge, Acknowledge

402. Collision domain can be compared to which distance data travels between two stations?

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

Exam Relevance: CCNA, Network+, CompTIA

Difficulty: Moderate

Concept notes: A collision domain is the area of a network where data packets can collide with each other. The maximum distance data travels between two stations within a collision domain is the key factor in determining the size of the collision domain.

Common Mistakes: Students often confuse the concept of collision domain with the minimum distance, which is not relevant to the definition of a collision domain.

Explanations: In a collision domain, data packets can collide with each other if they are transmitted simultaneously. The maximum distance data travels between two stations within this domain is critical because it defines the extent of the network segment where collisions can occur. This maximum distance is the defining characteristic of a collision domain.

Option Analysis:

Option A: Minimum distance is not relevant to the definition of a collision domain.
Option B: Maximum distance is the correct measure for defining the extent of a collision domain.
Option C: Virtual distance is not a term used in the context of collision domains.
Option D: Both (a) and (b) is incorrect because only the maximum distance is relevant.

Mnemonic: Max Distance, Max Collisions

403. 10BaseT is used to connect stations by using

Correct Answer: Correct answer is: (A) Star Topology.

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Easy

Concept notes: 10BaseT is a type of Ethernet that uses twisted pair cables and a star topology for network connections.

Common Mistakes: Students may confuse 10BaseT with other Ethernet standards like 10Base2 or 10Base5, which use different topologies.

Explanations: 10BaseT uses twisted pair cables to connect each station to a central hub or switch, forming a star topology. In a star topology, all devices are connected to a central device, which manages the data flow. This is different from bus or ring topologies, where devices are connected in a linear or circular fashion.

Option Analysis:

Option A: Correct. 10BaseT uses a star topology.
Option B: Incorrect. Bus topology is not used in 10BaseT.
Option C: Incorrect. Ring topology is not used in 10BaseT.
Option D: Incorrect. Mesh topology is not used in 10BaseT.

404. Attached to the end of the network to stop the data from bouncing back and causing interference

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

Exam Relevance: CCNA, CompTIA Network+, Network Engineering Exams

Difficulty: Easy

Concept notes: A terminator is a device used in networking to prevent signal reflection and interference.

Common Mistakes: Students may confuse a terminator with a repeater, which amplifies signals rather than stopping them.

Explanations: A terminator is attached to the end of a network cable to absorb the signal, preventing it from bouncing back and causing interference. This is crucial for maintaining signal integrity in certain types of networks, such as those using coaxial cable.

Option Analysis:

Option A: A repeater amplifies and retransmits signals but does not prevent signal reflection.
Option B: A terminator absorbs the signal at the end of the cable to prevent reflection.
Option C: A modem modulates and demodulates signals for transmission over telephone lines, not for preventing signal reflection.
Option D: A switch forwards data between devices on a network but does not prevent signal reflection.

Mnemonic: T for Terminator, T for Terminate.

405. Contention is

Correct Answer: Correct answer is: (C) The condition when two or more stations attempt to use the same channel at the same time.

Exam Relevance: CCNA, CompTIA Network+, Network Fundamentals

Difficulty: Moderate

Concept notes: Contention in data communication refers to a situation where multiple devices or stations try to access the same communication channel simultaneously, leading to potential conflicts or collisions.

Common Mistakes: Students often confuse contention with other network concepts such as collision, which is a specific type of contention that occurs in shared media networks.

Explanations: Contention is a fundamental concept in network communication, particularly in shared media networks like Ethernet. When two or more stations attempt to use the same channel at the same time, it results in contention. This can lead to data collisions and the need for retransmission, which can reduce network efficiency. Understanding contention is crucial for designing and managing network protocols that handle shared resources effectively.

Option Analysis:

Option A: This describes a bus or a common connection in a network, not contention.
Option B: This describes a carrier wave in modulation, not contention.
Option C: This correctly defines contention as the condition when multiple stations attempt to use the same channel simultaneously.
Option D: This describes a network, not contention.

406. If you want to disable STP on a port connected to a server, which command would you use?

Correct Answer: Correct answer is: (D) Spanning-tree portfast.

Exam Relevance: CCNA, CCNP, CCIE

Difficulty: Easy

Concept notes: Spanning Tree Protocol (STP) is used to prevent loops in a network by blocking redundant paths. The "spanning-tree portfast" command is used to disable STP on a port connected to a non-switch device, such as a server, to ensure immediate connectivity without waiting for STP to converge.

Common Mistakes: Students may mistakenly believe that "spanning-tree off" or "disable spanning-tree" commands are valid options to disable STP on a port, but these commands do not exist in the context of Cisco IOS.

Explanations: The "spanning-tree portfast" command is specifically designed to disable STP on a port connected to a non-switch device, such as a server. This ensures that the port immediately transitions to the forwarding state, bypassing the STP convergence process. This is the correct command to use in this scenario.

Option Analysis:

Option A: "disable spanning-tree" is not a valid command in Cisco IOS for disabling STP on a specific port.
Option B: "spanning-tree off" is not a valid command in Cisco IOS for disabling STP on a specific port.
Option C: "spanning-tree security" is a feature to protect against unauthorized devices, not to disable STP.
Option D: "spanning-tree portfast" is the correct command to disable STP on a port connected to a non-switch device.

407. Uplinks are also knowns as

Correct Answer: Correct answer is: (A) Reverse link.

Exam Relevance: GATE, GRE, ECE exams

Difficulty: Easy

Concept notes: In telecommunications, uplinks are known as reverse links because they transmit data from the mobile station (MS) to the base station (BS).

Common Mistakes: Students may confuse uplinks with forward links, which transmit data from the base station to the mobile station.

Explanations: Uplinks are the communication channels that carry data from the mobile station (MS) to the base station (BS). This direction of data flow is referred to as the reverse link because it is the opposite direction of the forward link, which carries data from the BS to the MS.

Option Analysis:

Option A: Correct. Uplinks are also known as reverse links.
Option B: Incorrect. BS link refers to the connection between base stations, not the direction of data flow.
Option C: Incorrect. Forward link refers to the data flow from the base station to the mobile station.
Option D: Incorrect. MS link is not a standard term used in telecommunications.

408. Computer networks fall into different types, one if these is a WAN, which stands for;

Correct Answer: Correct answer is: (D) Wide Area Network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Easy

Concept notes: WAN stands for Wide Area Network, which is a computer network that spans a large geographical area, such as a city, country, or even globally.

Common Mistakes: Students may confuse WAN with other network types like LAN (Local Area Network) or MAN (Metropolitan Area Network).

Explanations: WAN is the correct term for a network that covers a wide geographical area, connecting multiple LANs or MANs. The other options are incorrect as they do not accurately describe the term WAN.

Option Analysis:

Option A: Wireless Area Network is not a standard term in networking.
Option B: WiFi Available Network is not a standard term in networking.
Option C: Wireless Access Network is not a standard term in networking.
Option D: Wide Area Network is the correct term for a network that spans a large geographical area.

Mnemonic: WAN: Wide Area Network

409. The Largest WAN is?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: The Internet is the largest WAN (Wide Area Network) that connects millions of smaller networks worldwide.

Common Mistakes: Students may confuse LAN (Local Area Network) or MAN (Metropolitan Area Network) as the largest WAN due to their familiarity with these terms.

Explanations: The Internet is the largest WAN because it connects millions of smaller networks across the globe, enabling global communication and data exchange. LANs and MANs are smaller in scale and typically cover limited geographical areas.

Option Analysis:

Option A: LAN (Local Area Network) is a network that connects computers within a limited geographical area, such as a residence, school, or office building. It is not the largest WAN.
Option B: MAN (Metropolitan Area Network) is a network that connects computers within a metropolitan area, such as a city or town. It is larger than a LAN but still not the largest WAN.
Option C: Internet is the largest WAN, connecting millions of smaller networks worldwide.
Option D: PAN (Personal Area Network) is a network for interconnecting devices centered around an individual's workspace. It is much smaller in scale than a WAN.

410. A LAN is a collection of devices connected together in one physical location.

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

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Very Easy

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

Common Mistakes: Students might confuse LAN with WAN (Wide Area Network), which covers a larger geographical area.

Explanations: A LAN is defined as a network of devices connected together in a single physical location, such as a home, school, or office. This makes the statement true.

Option Analysis:

Option A: Correct, as LANs are indeed confined to a single physical location.
Option B: Incorrect, as LANs are specifically designed to operate within a limited area.

Mnemonic: LAN = Local Area Network

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Computer networking MCQ - Set 41

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