Computer networking MCQ

1041. Which two protocols would be used to transmit a file via the internet?

Correct Answer: Correct answer is: (D) Only (A) & (B).

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Moderate

Concept notes: FTP (File Transfer Protocol) and HTTPS (Hypertext Transfer Protocol Secure) are both used to transmit files over the internet. FTP is specifically designed for file transfer, while HTTPS is a secure version of HTTP used for secure data transmission, including file transfers.

Common Mistakes: Students may confuse DNS (Domain Name System) with file transfer protocols, as DNS is essential for resolving domain names to IP addresses but does not directly transfer files.

Explanations: FTP and HTTPS are both protocols used for transmitting files over the internet. FTP is a standard protocol specifically designed for file transfer, while HTTPS is a secure version of HTTP that can also be used for file transfers. DNS, on the other hand, is used for translating domain names into IP addresses and is not a file transfer protocol.

Option Analysis:

Option A: FTP is a correct choice as it is a protocol used for file transfer over the internet.
Option B: HTTPS is a correct choice as it is a secure protocol that can be used for file transfer over the internet.
Option C: DNS is not a file transfer protocol; it is used for translating domain names into IP addresses.
Option D: This option correctly identifies FTP and HTTPS as the protocols used for file transfer over the internet.

Mnemonic: FTP for files, HTTPS for secure files.

1042. A..... is normally a computer that operates in all five layers of the Internet model or seven layers of OSI model.

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: A gateway operates across all layers of the OSI model, facilitating communication between different types of networks or systems.

Common Mistakes: Students may confuse a gateway with a router, which operates primarily at the network layer (Layer 3) of the OSI model.

Explanations: A gateway is a device that operates in all seven layers of the OSI model. It can translate data between different protocols, making it capable of facilitating communication between networks that use different protocols. This comprehensive functionality across all layers distinguishes a gateway from other network devices like repeaters, bridges, and routers, which operate in fewer layers.

Option Analysis:

Option A: A repeater operates at the physical layer (Layer 1) of the OSI model, amplifying signals to extend the range of a network segment.
Option B: A bridge operates at the data link layer (Layer 2) of the OSI model, filtering and forwarding data frames between different network segments.
Option C: A router operates at the network layer (Layer 3) of the OSI model, routing data packets between different networks based on IP addresses.
Option D: A gateway operates in all seven layers of the OSI model, translating data between different protocols and facilitating communication between different types of networks.

Mnemonic: GATE: Gateway Across The Entire model

1043. FDDI is an example of which topology?

Correct Answer: Correct answer is: (B) Ring Topology.

Exam Relevance: Computer Networks, Data Communication, Network Fundamentals

Difficulty: Easy

Concept notes: FDDI (Fiber Distributed Data Interface) is a standard for data transmission in a local area network that uses a ring topology.

Common Mistakes: Students may confuse FDDI with other network topologies such as bus or star, which are used in different network standards.

Explanations: FDDI uses a ring topology where each node is connected to two other nodes, forming a closed loop. This allows data to travel in one direction around the ring, ensuring efficient and reliable data transmission.

Option Analysis:

Option A: Bus Topology is incorrect because FDDI does not use a linear bus structure.
Option B: Ring Topology is correct as FDDI is designed to operate in a ring configuration.
Option C: Star Topology is incorrect because FDDI does not use a central hub to connect all nodes.
Option D: None of these is incorrect as Ring Topology is the correct answer.

Mnemonic: Ring Around the FDDI

1044. RPC (remote procedure call) is a

Correct Answer: Correct answer is: (A) Synchronous operation.

Exam Relevance: Computer Science Fundamentals, Network Programming Exams, Distributed Systems Exams

Difficulty: Moderate

Concept notes: RPC (Remote Procedure Call) is a protocol that allows a computer program to cause a procedure (or function) to execute in another address space (commonly on another computer on a shared network), which is modelled like a local procedure call.

Common Mistakes: Students often confuse RPC with asynchronous operations because they assume that remote calls are inherently asynchronous due to the potential latency involved.

Explanations: RPC is considered a synchronous operation because the calling process waits for the remote procedure to complete and return a result before continuing. This waiting behavior is characteristic of synchronous operations, where the caller is blocked until the operation completes.

Option Analysis:

Option A: Correct. RPC is synchronous because the caller waits for the response.
Option B: Incorrect. Asynchronous operations do not wait for a response before continuing execution.
Option C: Incorrect. Time-independent operations do not fit the definition of RPC, which involves a specific sequence of call and response.
Option D: Incorrect. The correct answer is explicitly provided.

1045. In Process to Process delivery, At transport layer, we need a transport layer

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: In process-to-process delivery, the transport layer requires an address to identify the specific processes or applications on different hosts.

Common Mistakes: Students often confuse the role of the transport layer with that of the network layer, which uses IP addresses for routing.

Explanations: The transport layer is responsible for end-to-end communication between processes on different hosts. To achieve this, it needs a transport layer address, typically a port number, to identify the specific process or application. This is different from the network layer, which uses IP addresses to route packets between hosts.

Option Analysis:

Option A: IP addresses are used at the network layer for routing packets between hosts, not for identifying processes at the transport layer.
Option B: Link layer addresses (like MAC addresses) are used for communication between devices on the same network segment, not for process-to-process communication.
Option C: The transport layer requires an address to identify the specific processes or applications on different hosts, making this the correct choice.
Option D: Headers are part of the protocol data unit but do not directly address the requirement for identifying processes at the transport layer.

1046. Post Office Protocol, version 3 (POP3), has two modes, Delete Mode and

Correct Answer: Correct answer is: (B) Keep Mode.

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: Post Office Protocol, version 3 (POP3) has two modes: Delete Mode and Keep Mode. In Delete Mode, emails are deleted from the server after they are downloaded to the client. In Keep Mode, emails remain on the server after they are downloaded.

Common Mistakes: Students may confuse the modes with other email protocols or functionalities, such as the Outbox or Function Mode, which are not specific to POP3.

Explanations: POP3 operates in two modes: Delete Mode and Keep Mode. In Keep Mode, emails are retained on the server after being downloaded to the client, allowing for multiple devices to access the same emails. This is the correct answer as it aligns with the functionality of POP3.

Option Analysis:

Option A: Outbox Mode is not a recognized mode for POP3.
Option B: Keep Mode is the correct mode where emails remain on the server after being downloaded.
Option C: Idle Mode is not a recognized mode for POP3.
Option D: Function Mode is not a recognized mode for POP3.

1047. Which of the following are advantages of using NAT? 1. Translation introduces switching path delays. 2. Conserves legally registered addresses. 3. Causes loss of end-to-end IP traceability. 4. Increases flexibility when connecting to the Internet. 5. Certain applications will not function with NAT enabled. 6. Reduces address overlap occurrence.

Correct Answer: Correct answer is: (D) 2, 4 and 6.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: NAT (Network Address Translation) is a method used to remap one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. This technique is commonly used to enable multiple devices on a local network to share a single public IP address when connecting to the Internet.

Common Mistakes: Students often confuse the advantages and disadvantages of NAT. For example, they might incorrectly believe that translation delays and loss of end-to-end traceability are advantages rather than disadvantages.

Explanations: The advantages of using NAT include: - Conserving legally registered addresses (2): NAT allows multiple devices to share a single public IP address, reducing the need for a large number of unique public IP addresses. - Increasing flexibility when connecting to the Internet (4): NAT allows for easier reconfiguration of internal networks without affecting external connectivity. - Reducing address overlap occurrence (6): NAT can prevent conflicts between private IP addresses used in different networks by translating them to unique public IP addresses. The other options are either disadvantages or not directly related to the advantages of NAT.

Option Analysis:

Option A: Incorrect because 1 and 3 are disadvantages of NAT, not advantages.
Option B: Incorrect because 3 and 5 are disadvantages of NAT, not advantages.
Option C: Incorrect because 5 and 6 are not both advantages; 5 is a disadvantage.
Option D: Correct because 2, 4, and 6 are all advantages of NAT.

Mnemonic: NAT saves, flexes, and reduces overlap.

1048. Which area of the network would a college IT staff most likely have to redesign as a direct result of many students bringing their own tablets and smartphones to school to access school resources?

Correct Answer: Correct answer is: (D) Wireless LAN.

Exam Relevance: CISSP, CompTIA Network+, CCNA </

Difficulty: Moderate

Concept notes: The wireless LAN (Local Area Network) is the network infrastructure that provides wireless internet access to devices like tablets and smartphones. As more students bring their own devices to school, the demand for wireless connectivity increases, often necessitating a redesign of the wireless LAN to handle the additional load and ensure reliable access.

Common Mistakes: Students might mistakenly think that the wired LAN or intranet would need redesigning, as they may not fully understand the difference between wired and wireless networks and the specific demands of mobile devices.

Explanations: The wireless LAN is the most likely area to require redesign because it directly supports the wireless devices that students bring to school. As the number of wireless devices increases, the existing wireless infrastructure may become overwhelmed, leading to slower speeds and connectivity issues. Redesigning the wireless LAN can include adding more access points, upgrading equipment, and optimizing the network to handle the increased demand.

Option Analysis:

Option A: The extranet is a network that allows secure access to a company's network by external users, such as partners or customers. It is not directly related to the internal wireless network used by students.
Option B: The intranet is a private network that is used within an organization. While it may need updates, it is not the primary network that students' personal devices would access.
Option C: The wired LAN provides network connectivity through physical cables. While it may be part of the overall network infrastructure, it is not the primary network that supports mobile devices.
Option D: The wireless LAN is the network that provides wireless internet access to devices like tablets and smartphones. As more students bring their own devices, the wireless LAN is the most likely area to need redesigning to handle the increased demand.

Mnemonic: WLAN for Wireless Wonder

1049. Classful addressing is replaced with

Correct Answer: Correct answer is: (D) Classless addressing.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: Classful addressing is a method of allocating IP addresses that divides the address space into fixed-size blocks. Classless addressing, also known as Classless Inter-Domain Routing (CIDR), allows for more flexible allocation of IP addresses by using variable-length subnet masks.

Common Mistakes: Students may confuse classful addressing with classless addressing, thinking that subclass addressing or fully occupied addresses are alternatives to classful addressing.

Explanations: Classful addressing is replaced with classless addressing because classless addressing provides more efficient use of IP addresses and better scalability. Classless addressing allows for more flexible allocation of IP addresses, which is essential in today's internet where the number of devices and the need for IP addresses are constantly increasing.

Option Analysis:

Option A: Subclass addressing is not a recognized term in IP addressing schemes.
Option B: Fully occupied addresses is not a term used in IP addressing schemes.
Option C: Upper-class addressing is not a recognized term in IP addressing schemes.
Option D: Classless addressing is the correct term for the replacement of classful addressing.

Mnemonic: CIDR for Classless, Flexible IP

1050. Which NetWare protocol works on layer 3-network layer-of the OSI model?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: IPX (Internetwork Packet Exchange) is a network layer protocol that operates at layer 3 of the OSI model. It is responsible for routing packets between different networks.

Common Mistakes: Students may confuse IPX with SPX (Sequenced Packet Exchange), which operates at the transport layer (layer 4) of the OSI model.

Explanations: IPX operates at the network layer (layer 3) of the OSI model, which is responsible for routing packets between different networks. This makes it the correct choice for a protocol that works at layer 3. NCP (NetWare Core Protocol) operates at the session layer (layer 5), SPX operates at the transport layer (layer 4), and NetBIOS (Network Basic Input/Output System) operates at the session layer (layer 5) and is not specific to NetWare.

Option Analysis:

Option A: IPX operates at the network layer (layer 3) of the OSI model.
Option B: NCP operates at the session layer (layer 5) of the OSI model.
Option C: SPX operates at the transport layer (layer 4) of the OSI model.
Option D: NetBIOS operates at the session layer (layer 5) of the OSI model.

Mnemonic: IPX: "I Pass X-networks" (indicating it passes through different networks, aligning with layer 3 functionality).

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Computer networking MCQ - Set 105

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