Computer networking MCQ – Change your future

871. TELNET is an abbreviation for.....

Correct Answer: Correct answer is: (A) Terminal network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Very Easy

Concept notes: TELNET stands for Terminal Network.

Common Mistakes: Students may confuse TELNET with other network-related acronyms like TCP/IP or DNS.

Explanations: TELNET is an abbreviation for Terminal Network. It is a protocol used for remote login over a network, allowing a user to connect to a remote computer and interact with it as if they were directly connected to it.

Option Analysis:

Option A: Correct. TELNET stands for Terminal Network.
Option B: Incorrect. TELNET does not stand for Telephone Network.
Option C: Incorrect. TELNET does not stand for Telecommunication Network.
Option D: Incorrect. The correct answer is provided in option A.

872. Network of terminals or computer system often limited in a building is classified as

Correct Answer: Correct answer is: (B) Local area network.

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

Difficulty: Easy

Concept notes: A local area network (LAN) 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), which covers a larger geographical area.

Explanations: A local area network (LAN) is designed to connect devices within a limited area, such as a building or a group of buildings. This makes it the correct classification for a network of terminals or a computer system that is limited to a building.

Option Analysis:

Option A: Regional area network is not a standard term in networking. It is likely a misunderstanding or confusion with other network types.
Option B: Local area network (LAN) is the correct term for a network confined to a limited area such as a building.
Option C: Wide area network (WAN) covers a larger geographical area, such as cities or countries, and is not limited to a single building.
Option D: Hybrid area network is not a standard term in networking and does not specifically refer to a network limited to a building.

Mnemonic: LAN: Local Area Network

873. What command do you type to save the configuration stored in RAM to NVRAM?

Correct Answer: Correct answer is: (D) Router#copy run startup.

Exam Relevance: CCNA, CompTIA Network+, Cisco Certified Network Associate

Difficulty: Easy

Concept notes: The command to save the configuration stored in RAM (running-config) to NVRAM (startup-config) is essential for network device configuration management.

Common Mistakes: Students often confuse the direction of the copy command, thinking it should be from NVRAM to RAM instead of the other way around.

Explanations: The command "Router#copy run startup" is used to save the current running configuration in RAM to the startup configuration in NVRAM. This ensures that the configuration is retained after a reboot.

Option Analysis:

Option A: Incorrect. The command syntax is not valid. The correct command is "copy running-config startup-config".
Option B: Incorrect. The command syntax is not valid. The correct command is "copy running-config startup-config".
Option C: Incorrect. The command syntax is not valid. The correct command is "copy running-config startup-config".
Option D: Correct. The command "Router#copy run startup" is the correct command to save the running configuration to the startup configuration.

874. Error recovery takes place at which layer?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: Error recovery is a function of the transport layer in the OSI model. This layer ensures reliable data transfer between end systems by handling error detection and correction.

Common Mistakes: Students often confuse the transport layer with the data link layer, which also handles error detection but not recovery.

Explanations: The transport layer is responsible for error recovery, ensuring that data is transmitted reliably from the source to the destination. It uses mechanisms like sequence numbers, acknowledgments, and retransmissions to detect and correct errors. The data link layer, while it does perform error detection, does not handle error recovery in the same comprehensive manner as the transport layer.

Option Analysis:

Option A: Correct. The transport layer is responsible for error recovery.
Option B: Incorrect. The presentation layer is responsible for data representation and encryption, not error recovery.
Option C: Incorrect. The data link layer performs error detection but not recovery.
Option D: Incorrect. The application layer is the interface between the application and the network, not responsible for error recovery.

875. The sharing of a medium and its link by two or more devices is called.....

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

Exam Relevance: Networking exams, Telecommunications exams, Computer Science exams

Difficulty: Easy

Concept notes: Multiplexing is the process of combining multiple signals for transmission over a single medium.

Common Mistakes: Students may confuse multiplexing with full-duplex communication, which refers to the ability to send and receive data simultaneously on the same medium.

Explanations: Multiplexing allows multiple devices to share a single communication channel by dividing the channel into time slots, frequency bands, or code sequences. This sharing of a medium and its link by two or more devices is precisely what multiplexing accomplishes.

Option Analysis:

Option A: Fully duplexing refers to the ability to send and receive data simultaneously on the same medium, not the sharing of a medium by multiple devices.
Option B: Multiplexing is the correct term for sharing a medium and its link by two or more devices.
Option C: While both terms are related to communication, fully duplexing does not describe the sharing of a medium by multiple devices.
Option D: This option is incorrect as multiplexing is the correct term for the described scenario.

Mnemonic: Mnemonic: "Many Devices, One Path" (MDOP) for Multiplexing.

876. What is stat frame delimeter (SFD) in ethernet frame?

Correct Answer: Correct answer is: (B) 10101011.

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

Difficulty: Easy

Concept notes: The stat frame delimiter (SFD) in an Ethernet frame is a specific bit pattern used to mark the beginning of the frame data. It helps the receiver synchronize with the incoming data stream.

Common Mistakes: Students often confuse the SFD with the preamble, which is a different bit pattern used before the SFD to synchronize the receiver.

Explanations: The SFD in an Ethernet frame is the bit pattern 10101011. This pattern is used to indicate the start of the actual data in the frame, following the preamble. The SFD is crucial for the receiver to correctly identify the beginning of the frame data.

Option Analysis:

Option A: 10101010 is not the correct SFD pattern. It is often used in the preamble for synchronization.
Option B: 10101011 is the correct SFD pattern used in Ethernet frames to mark the start of the frame data.
Option C: 0 is not a valid SFD pattern in Ethernet frames.
Option D: 11111111 is not the correct SFD pattern in Ethernet frames.

Mnemonic: SFD: Sync Frame Delimiter, "10101011" to Begin

877. Circuit switching takes place at the

Correct Answer: Correct answer is: (D) Physical layer.

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Easy

Concept notes: Circuit switching is a method of establishing a dedicated communication path between two points. This path is established at the physical layer, which deals with the transmission of raw bit streams over a physical medium.

Common Mistakes: Students often confuse circuit switching with other switching methods like packet switching, which operates at higher layers of the OSI model.

Explanations: Circuit switching involves the establishment of a dedicated physical path for communication. This path is set up at the physical layer, which is responsible for the transmission of raw bit streams over the physical medium. The physical layer ensures that the bits are transmitted accurately and without interference, making it the appropriate layer for circuit switching.

Option Analysis:

Option A: The session layer manages sessions between applications and does not handle the physical transmission of data.
Option B: The application layer deals with user applications and does not handle the physical transmission of data.
Option C: The data link layer is responsible for error-free transmission of data frames between nodes but does not establish dedicated physical paths.
Option D: The physical layer is responsible for the transmission of raw bit streams over the physical medium, making it the correct layer for circuit switching.

878. The software that enables the user to interact with the contents present on a web page?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A browser is a software application that allows users to access and interact with content on the World Wide Web.

Common Mistakes: Students may confuse the browser with other internet-related terms like HTTP or URL, which are not software applications but protocols or addresses.

Explanations: The browser is the software that enables users to interact with the contents present on a web page. It fetches and displays web pages, allowing users to navigate and interact with the content. Other options like WWW, HTTP, and URL are not software applications but are related to the structure and addressing of the web.

Option Analysis:

Option A: WWW (World Wide Web) is the system of interlinked hypertext documents accessible via the internet, not a software application.
Option B: HTTP (Hypertext Transfer Protocol) is a protocol used for transmitting web pages, not a software application.
Option C: Browser is the correct answer as it is the software that enables interaction with web content.
Option D: URL (Uniform Resource Locator) is an address used to locate a resource on the internet, not a software application.

879. Which of the following terms is used to describe a hardware-or software-based device that protects networks from outside threats?

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

Exam Relevance: CompTIA A+, CCNA, Network+

Difficulty: Easy

Concept notes: A firewall is a hardware or software-based system designed to prevent unauthorized access to or from a private network.

Common Mistakes: Students may confuse a firewall with other network devices like a gateway or hub, which have different primary functions.

Explanations: A firewall is specifically designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between trusted internal networks and untrusted external networks, such as the internet. This makes it the correct choice for protecting networks from outside threats.

Option Analysis:

Option A: NIC (Network Interface Card) is a hardware component that allows a computer to connect to a network, but it does not provide security functions.
Option B: Gateway is a network device that routes traffic between different networks, but it does not specifically protect against threats.
Option C: Firewall is the correct choice as it is designed to protect networks from unauthorized access and threats.
Option D: Hub is a simple networking device that broadcasts data to all connected devices, without providing any security functions.

Mnemonic: Firewall: "F" for "Fortress" - it's like a fortress protecting your network.

880. NIC Stands for .....

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

Exam Relevance: CCNA, CompTIA A+, Network+

Difficulty: Very Easy

Concept notes: NIC stands for Network Interface Card, which is a hardware component that allows a computer to connect to a network.

Common Mistakes: Students may confuse NIC with other acronyms or terms that sound similar, such as NAC (Network Access Control).

Explanations: NIC is the correct term for a hardware component that enables network connectivity. It is essential for connecting a computer to a network, facilitating data transmission and reception.

Option Analysis:

Option A: Incorrect, as NIC does not stand for Network Intersection cord.
Option B: Correct, NIC stands for Network Interface Card.
Option C: Incorrect, as NIC does not stand for No Interface connection.
Option D: Incorrect, as this option is empty.

⬅ Previous SetSet 88Next Set ➡

Computer networking MCQ - Set 88

Leave a Reply