Computer networking MCQ – Change your future

791. The protocol for file transfer

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

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

Difficulty: Easy

Concept notes: FTP stands for File Transfer Protocol, which is a standard network protocol used for the transfer of files from one host to another over a TCP-based network, such as the Internet.

Common Mistakes: Students may confuse FTP with HTTP or HTTPS, which are used for web browsing and secure web browsing, respectively, rather than file transfer.

Explanations: FTP is specifically designed for transferring files between computers on a network. It is a protocol that allows users to upload, download, and manage files on a remote server. HTTP and HTTPS are used for web browsing and secure web browsing, not for file transfer. PDF is a file format, not a protocol.

Option Analysis:

Option A: HTTP is used for web browsing, not file transfer.
Option B: HTTPS is used for secure web browsing, not file transfer.
Option C: FTP is the correct protocol for file transfer.
Option D: PDF is a file format, not a protocol for file transfer.

792. When a router needs to send a packet destined for another network, it must know the

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: When a router needs to send a packet to another network, it uses the destination IP address to determine the next hop in the network path.

Common Mistakes: Students may mistakenly think the router needs to know the entire path or the physical medium to send the packet.

Explanations: The router uses the destination IP address to forward the packet to the next hop. The IP address contains information about the network and host, allowing the router to make routing decisions based on the routing table.

Option Analysis:

Option A: A datagram is a self-contained, independent entity of data carrying sufficient information to be routed from the source to the destination computer without reliance on earlier exchanges between the source and destination. It is not what the router needs to know to send a packet.
Option B: The medium refers to the physical layer over which data is transmitted, such as Ethernet or Wi-Fi. While the medium is important for transmission, it is not what the router needs to know to send a packet to another network.
Option C: Path flow is not a standard term in networking. The router does not need to know the entire path flow to send a packet; it only needs to know the next hop.
Option D: The IP address is the correct answer because it contains the necessary information for the router to determine the next hop in the network path.

Mnemonic: IP: Identify Path

793. Transmission media which consists of thin glass to transmit beams of light is

Correct Answer: Correct answer is: (C) Fiber optics cable.

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

Difficulty: Easy

Concept notes: Fiber optics cable uses thin strands of glass or plastic to transmit data as light signals.

Common Mistakes: Students may confuse fiber optics with other types of cables like twisted pair or coaxial cable, which use electrical signals rather than light.

Explanations: Fiber optics cable consists of thin glass fibers that transmit data as beams of light. This makes it distinct from other transmission media like twisted pair and coaxial cable, which use electrical signals. The use of light allows fiber optics to transmit data over longer distances with less signal degradation.

Option Analysis:

Option A: Twisted pair cables use electrical signals and are not capable of transmitting light.
Option B: Coaxial cables also use electrical signals and are not designed to transmit light.
Option C: Fiber optics cable uses thin glass fibers to transmit light signals, making it the correct choice.
Option D: Satellite transmission involves radio waves and does not use thin glass fibers to transmit light.

794. The local host and the remote host are defined using IP addresses. To define the processes, we need second identifiers called.....

Correct Answer: Correct answer is: (C) Port addresses.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: Port addresses are used to identify specific processes on a host.

Common Mistakes: Students may confuse port addresses with IP addresses, which are used to identify hosts rather than processes.

Explanations: In networking, IP addresses are used to identify hosts on a network. However, to distinguish between different processes running on the same host, port addresses are used. Each process is associated with a unique port number, allowing data to be directed to the correct process on the host.

Option Analysis:

Option A: UDP addresses are not a standard term in networking. UDP is a protocol, not an address type.
Option B: Transport addresses are not a standard term in networking. The term "transport" refers to the layer in the OSI model, not an address type.
Option C: Port addresses are the correct term used to identify specific processes on a host.
Option D: This option is incorrect as port addresses are the correct answer.

795. Next-Hop Method is used to reduce contents of a

Correct Answer: Correct answer is: (C) Routing Table.

Exam Relevance: CCNA, CCNP, Network+

Difficulty: Moderate

Concept notes: The Next-Hop Method is a technique used in network routing to reduce the size of routing tables.

Common Mistakes: Students may confuse the Next-Hop Method with other routing techniques or table types, such as ARP tables or DNS tables.

Explanations: The Next-Hop Method is used to reduce the size of routing tables by specifying the next router to which a packet should be sent, rather than listing all possible routes. This method simplifies the routing process and reduces the amount of information that needs to be stored in the routing table.

Option Analysis:

Option A: Revolving table is not a standard term in networking and does not relate to routing tables.
Option B: Rotating Table is not a standard term in networking and does not relate to routing tables.
Option C: Routing Table is the correct term used in networking to store routing information.
Option D: Re-allocate table is not a standard term in networking and does not relate to routing tables.

796. ADSL is an asymmetric communication technology designed for

Correct Answer: Correct answer is: (C) Residential users.

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

Difficulty: Easy

Concept notes: ADSL (Asymmetric Digital Subscriber Line) is a technology that provides internet access over standard telephone lines. It is designed to offer higher download speeds than upload speeds, making it suitable for typical residential internet usage where more data is usually downloaded than uploaded.

Common Mistakes: Students may mistakenly believe that ADSL is primarily designed for businesses due to its high-speed capabilities, but ADSL is more commonly used in residential settings.

Explanations: ADSL is specifically designed for residential users because it provides higher download speeds compared to upload speeds, which aligns with the typical usage patterns of residential users. Residential users often download more data (e.g., streaming videos, browsing the web) than they upload, making ADSL an efficient and cost-effective solution for home internet access.

Option Analysis:

Option A: ADSL is not primarily designed for students, although students may use it. The technology is more broadly aimed at residential users.
Option B: Businesses typically require symmetric high-speed internet, which ADSL does not provide. Therefore, ADSL is not designed for businesses.
Option C: ADSL is designed for residential users due to its asymmetric speed characteristics, which match the typical usage patterns of residential users.
Option D: This option is incorrect because ADSL is specifically designed for residential users.

Mnemonic: ADSL: Asymmetric Download, Symmetric Low (upload)

797. You are a system administrator on a NetWare network, you are runningNetWare 4.11 and you cannot communicate with your router. What is the likelyproblem?

Correct Answer: Correct answer is: (A) NetWare 4.11 defaults to 802.2 encapsulation.

Exam Relevance: CompTIA Network+, Cisco CCNA

Difficulty: Moderate

Concept notes: NetWare 4.11 uses 802.2 encapsulation by default, which can cause communication issues with routers that use a different encapsulation type.

Common Mistakes: Students may mistakenly believe that NetWare 4.11 uses 802.3 encapsulation, which is incorrect.

Explanations: NetWare 4.11 defaults to 802.2 encapsulation, which is a frame format used in IEEE 802 networks. This can lead to communication problems with routers that use a different encapsulation type, such as 802.3. Therefore, the inability to communicate with the router is likely due to the mismatch in encapsulation types.

Option Analysis:

Option A: Correct. NetWare 4.11 defaults to 802.2 encapsulation, which can cause communication issues with routers using a different encapsulation type.
Option B: Incorrect. NetWare 4.11 does not default to 802.3 encapsulation.
Option C: Incorrect. Cisco routers can work with NetWare 4.11 if the encapsulation types are compatible.
Option D: Incorrect. NetWare 3.11 defaults to 802.3 encapsulation, not 802.2.

Mnemonic: NW411-8022

798. A ..... must be used to deliver messages to devices that are in different LANs.

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: A router is used to connect different LANs and deliver messages between them.

Common Mistakes: Students may confuse a router with a switch or bridge, which operate at different layers of the network and do not connect different LANs.

Explanations: A router operates at the network layer (Layer 3) of the OSI model and is capable of routing packets between different networks. It uses IP addresses to determine the best path for data to travel from one network to another. This capability makes it essential for delivering messages between devices in different LANs. Hubs and switches operate at the data link layer (Layer 2) and are used for connecting devices within the same LAN, while bridges can connect two LANs but do not route between different networks.

Option Analysis:

Option A: A hub operates at the physical layer (Layer 1) and simply broadcasts data to all connected devices, making it unsuitable for inter-LAN communication.
Option B: A switch operates at the data link layer (Layer 2) and forwards data based on MAC addresses, which is not sufficient for routing between different LANs.
Option C: A router operates at the network layer (Layer 3) and can route packets between different networks, making it the correct choice for delivering messages between devices in different LANs.
Option D: A bridge operates at the data link layer (Layer 2) and can connect two LANs but does not route between different networks, making it unsuitable for inter-LAN communication.

Mnemonic: Remember: Routers Route, Switches Switch, Hubs Hub, Bridges Bridge.

799. If a host does not support flow label, it sets flow label field to

Correct Answer: Correct answer is: (D) Zero.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: In IPv6, the flow label field is used to identify packets that belong to the same flow. If a host does not support flow labels, it sets the flow label field to zero.

Common Mistakes: Students may mistakenly believe that the flow label field should be set to a non-zero value if the host does not support it.

Explanations: The flow label field in IPv6 is used to identify packets that belong to the same flow. If a host does not support flow labels, it should set the flow label field to zero to indicate that no specific flow is being identified. This ensures compatibility and proper handling of packets by routers and other network devices.

Option Analysis:

Option A: Incorrect. Setting the flow label to one does not indicate the absence of flow label support.
Option B: Incorrect. Setting the flow label to two does not indicate the absence of flow label support.
Option C: Incorrect. Setting the flow label to three does not indicate the absence of flow label support.
Option D: Correct. Setting the flow label to zero indicates that the host does not support flow labels.

800. What is a RING Topology?

Correct Answer: Correct answer is: (A) A ring network is a network topology in which each node connects to exactly two other nodes.

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Easy

Concept notes: In a ring topology, each node is connected to exactly two other nodes, forming a closed loop.

Common Mistakes: Students may confuse ring topology with bus or star topologies, where nodes connect differently.

Explanations: A ring topology is characterized by each node connecting to exactly two other nodes, forming a closed loop. This ensures that data travels in one direction around the ring, from one node to the next, until it reaches its destination. This topology is distinct from other topologies like bus or star, where nodes connect differently.

Option Analysis:

Option A: Correct. Each node in a ring topology connects to exactly two other nodes.
Option B: Incorrect. This describes a fully connected mesh topology, not a ring topology.
Option C: Incorrect. This describes a star topology, where nodes connect to a central hub.
Option D: Incorrect. This is not a valid description of any network topology.

Mnemonic: Ring = Round, Two = Together

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Computer networking MCQ - Set 80

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