Computer networking MCQ

1521. A device used to connect two networks that have different protocols.

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: A gateway is a device that connects two networks with different protocols, allowing them to communicate with each other.

Common Mistakes: Students may confuse a gateway with a bridge or a switch, which are used for connecting networks with the same protocol.

Explanations: A gateway is specifically designed to connect networks that use different protocols. It acts as an intermediary, translating data between the different protocols so that the networks can communicate. This is why a gateway is the correct answer for a device that connects two networks with different protocols.

Option Analysis:

Option A: A Gateway is correct because it can connect networks with different protocols.
Option B: A Bridge connects networks with the same protocol, not different ones.
Option C: A Switch also connects networks with the same protocol, not different ones.
Option D: A Server is a device that provides services to other devices on a network, not a device for connecting different protocols.

Mnemonic: GATE: Gateway Acts To Enable

1522. Q10: Which components are internal to a computer and required to connect to a network? (1-4)

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

Exam Relevance: CompTIA A+, CCNA, Network+

Difficulty: Easy

Concept notes: A network interface card (NIC) is an internal component of a computer that allows it to connect to a network.

Common Mistakes: Students may confuse external networking devices like wireless access points, switches, and hubs with internal components.

Explanations: A network interface card (NIC) is an internal hardware component that enables a computer to connect to a network. It is required for the computer to communicate with other devices on the network. Other options like wireless access points, switches, and hubs are external networking devices and not internal to the computer.

Option Analysis:

Option A: A wireless access point is an external device used to provide wireless network access. It is not an internal component of a computer.
Option B: A network interface card (NIC) is an internal component of a computer that allows it to connect to a network.
Option C: A switch is an external networking device used to connect multiple devices on a network. It is not an internal component of a computer.
Option D: A hub is an external networking device used to connect multiple devices on a network. It is not an internal component of a computer.

Mnemonic: NIC for Network Inside Computer

1523. Whats app is an example of

Correct Answer: Correct answer is: (C) Full duplex.

Exam Relevance: Computer Networks, Data Communication, Telecommunication Engineering

Difficulty: Moderate

Concept notes: Full duplex communication allows simultaneous two-way data transmission.

Common Mistakes: Students may confuse full duplex with half duplex, where only one direction can transmit at a time.

Explanations: WhatsApp is an example of full duplex communication because it allows users to send and receive messages simultaneously. This means that while one user is sending a message, the other user can also send a message at the same time, without any delay or interruption.

Option Analysis:

Option A: Simplex communication allows only one-way data transmission, which is not applicable to WhatsApp.
Option B: Half duplex communication allows two-way data transmission but not simultaneously, which is not the case for WhatsApp.
Option C: Full duplex communication allows simultaneous two-way data transmission, which is the correct characteristic of WhatsApp.

1524. Each computer has a unique ....., like a telephone number for the internet.

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

Exam Relevance: AP Computer Science Principles, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: An IP address is a unique identifier for a device on a network, similar to a telephone number for the internet.

Common Mistakes: Students may confuse IP addresses with other network identifiers like MAC addresses or domain names.

Explanations: An IP address is a unique identifier assigned to each device connected to a network. It allows devices to communicate with each other over the internet. This unique identifier is essential for routing data packets to the correct destination, making it analogous to a telephone number for the internet.

Option Analysis:

Option A: A meme is a humorous image, video, or piece of text that is copied and spread rapidly by internet users. It is not a unique identifier for a device.
Option B: A graphic card is a hardware component that processes and outputs images to a display. It is not a unique identifier for a device.
Option C: An IP address is a unique identifier assigned to each device connected to a network, making it the correct answer.
Option D: A network pin is not a standard term and does not refer to a unique identifier for a device.

Mnemonic: IP = Internet Phone

1525. Data communication system within a building or campus is.....

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

Exam Relevance: Computer Networks, IT Fundamentals, CCNA, CISSP

Difficulty: Easy

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

Common Mistakes: Students may confuse LAN with WAN (Wide Area Network) or MAN (Metropolitan Area Network), which cover larger geographical areas.

Explanations: A LAN is designed to cover a small geographical area, such as a building or campus. This makes it the most appropriate choice for data communication within a limited area. WANs cover larger geographical areas, such as cities, countries, or even the world, while MANs cover a larger area than a LAN but smaller than a WAN, typically a city or large campus. PANs (Personal Area Networks) are even smaller, typically covering the immediate area around a person.

Option Analysis:

Option A: WAN is incorrect because it covers a much larger geographical area, such as cities or countries.
Option B: LAN is correct because it is designed for data communication within a limited area, such as a building or campus.
Option C: MAN is incorrect because it covers a larger area than a LAN, typically a city or large campus.
Option D: PAN is incorrect because it covers a very small area, typically around a person.

Mnemonic: LAN: Local Area Network, think "Local" for "Limited" area.

1526. Two 802.3 devices were connected. In the first one transmission was set to half-duplex and transmission speed to 100Mbit/s. In the second one all parameters were set automatically. Access method used in the second device is:

Correct Answer: Correct answer is: (A) CSMA/CD.

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

Difficulty: Moderate

Concept notes: CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is the access method used in Ethernet networks, including 802.3 standards. It is designed to manage data transmission in a shared medium, ensuring that devices can detect and resolve collisions.

Common Mistakes: Students may confuse CSMA/CD with CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance), which is used in wireless networks like 802.11.

Explanations: The second device, set to auto-negotiate, will detect the half-duplex mode and 100Mbit/s speed from the first device. Since the network is an 802.3 Ethernet network, it will use CSMA/CD as the access method. This is because CSMA/CD is the standard access method for wired Ethernet networks, ensuring that devices can detect and handle collisions effectively.

Option Analysis:

Option A: Correct. CSMA/CD is the access method used in 802.3 Ethernet networks.
Option B: Incorrect. CSMA/CA is used in wireless networks, not wired Ethernet networks.
Option C: Incorrect. The access method can be specified based on the network standard and configuration.

1527. Which part of the computer component is known to be like a traffic police?

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

Exam Relevance: CCNA, CompTIA Network+, A+

Difficulty: Moderate

Concept notes: A router is a device that directs data traffic between different networks, similar to how a traffic police directs vehicles at an intersection.

Common Mistakes: Students may confuse the functions of a router with those of a switch or modem, which also handle data transmission but in different ways.

Explanations: A router is responsible for directing data packets to their correct destinations across different networks. This function is analogous to a traffic police officer who directs vehicles to their correct routes. Routers use routing tables and protocols to make decisions about where to send data, much like a traffic police officer uses rules and signals to manage traffic flow.

Option Analysis:

Option A: Router is correct because it directs data traffic between different networks, similar to a traffic police directing vehicles.
Option B: Wireless Access Point is incorrect because it primarily provides wireless connectivity to devices but does not direct traffic between networks.
Option C: Switch is incorrect because it directs traffic within a single network but does not handle traffic between different networks.
Option D: Modem is incorrect because it connects a local network to the internet but does not direct traffic between different networks.

Mnemonic: Router = Route Traffic

1528. Which layer is responsible for process to process delivery in a general network model?

Correct Answer: Correct answer is: (C) Transport Layer.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The Transport Layer is responsible for end-to-end process-to-process delivery of data in a network.

Common Mistakes: Students often confuse the Transport Layer with the Network Layer, which is responsible for routing data between different networks.

Explanations: The Transport Layer ensures reliable data transfer between processes on different hosts. It handles segmentation, flow control, error control, and multiplexing. The Network Layer, on the other hand, is responsible for routing data packets across different networks, but not for process-to-process delivery.

Option Analysis:

Option A: The Application Layer is the highest layer in the OSI model and deals with software applications and user interfaces, not process-to-process delivery.
Option B: The Network Layer is responsible for routing data packets between different networks, not for process-to-process delivery.
Option C: The Transport Layer is responsible for end-to-end process-to-process delivery of data, making it the correct answer.
Option D: The Data Link Layer is responsible for node-to-node delivery within the same network, not process-to-process delivery.

1529. RIP v2 allows to

Correct Answer: Correct answer is: (B) Include subnet masks in the routing update.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: RIP v2 is an enhanced version of the Routing Information Protocol (RIP) that includes support for variable-length subnet masks (VLSM) and classless inter-domain routing (CIDR).

Common Mistakes: Students may mistakenly believe that RIP v2 can support paths longer than 16 hops, which is not true as the maximum hop count remains at 16.

Explanations: RIP v2 includes subnet masks in the routing update, which allows for more efficient use of IP addresses and supports VLSM. This feature is crucial for modern network design and management.

Option Analysis:

Option A: This is incorrect because RIP v2 still has a maximum hop count of 16, which means it cannot support paths longer than 16 nodes.
Option B: This is correct because RIP v2 includes subnet masks in the routing update, which is a key feature of the protocol.
Option C: This is incorrect because only the inclusion of subnet masks in the routing update is a correct feature of RIP v2, not the ability to look for paths longer than 16 nodes.

Mnemonic: RIP v2: Subnet masks included, not beyond 16 hops.

1530. Is the maximum amount of data that can pass through the medium (e.g. wire) per second ...

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

Exam Relevance: Networking Fundamentals, Computer Science Exams, Telecommunications Exams

Difficulty: Moderate

Concept notes: Bandwidth refers to the maximum amount of data that can pass through a medium per second.

Common Mistakes: Students often confuse bandwidth with bit rate, which is the speed at which data is transmitted.

Explanations: Bandwidth is defined as the maximum amount of data that can pass through a medium per second. This is a fundamental concept in data communication and networking. It is important to understand that bandwidth is a measure of capacity, not speed. The correct answer, bandwidth, directly addresses the maximum data capacity of a medium.

Option Analysis:

Option A: Latency refers to the delay before a transfer of data begins following an instruction for its transfer. It is not related to the maximum amount of data that can pass through a medium per second.
Option B: Bit rate is the speed at which data is transmitted, measured in bits per second. It is not the same as bandwidth, which is the capacity of the medium.
Option C: Bandwidth is the correct term for the maximum amount of data that can pass through a medium per second.
Option D: Durability refers to the ability of a medium to withstand damage or wear over time, and is not related to data capacity.

Mnemonic: BANDWIDTH: Big Amount of Network Data, Widely Informed

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Computer networking MCQ - Set 153

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