Tag: networking

Questions Related to networking

Which of the following are benefits of using a layered network model?
networking osi-model

  1. it facilitates troubleshooting

  2. it breaks the complex process of networking into more manageable chunks

  3. it allows layers developed by different vendors to interoperate.

  4. all of the above

Show answer
Correct Option: D

The layers of the OSI model, from the top down, are:
networking osi-model

  1. application, presentation, session, transport, network, data link, physical

  2. session, presentation, data transport, MAC, network, physical

  3. physical, data link, network, transport, session, presentation, application

  4. application, encryption, network, transport, logical link control, physical

Show answer
Correct Option: A
Explanation:

To answer this question, the user needs to have an understanding of the OSI (Open Systems Interconnection) model, which is a conceptual framework used to describe how data is transmitted over a network. The model is divided into seven layers, and each layer is responsible for a specific aspect of the communication process.

Now, let's go through each option and explain why it is right or wrong:

A. application, presentation, session, transport, network, data link, physical: This option is correct. The OSI model layers, from top to bottom, are application, presentation, session, transport, network, data link, and physical. This sequence spells out the mnemonic "All People Seem To Need Data Processing," which can be used to help remember the order of the layers.

B. session, presentation, data transport, MAC, network, physical: This option is incorrect. The layers listed in this option are not in the correct order, and some of the layer names are incorrect. For example, "data transport" is not a layer in the OSI model, and "MAC" refers to the Media Access Control sublayer, which is part of the data link layer.

C. physical, data link, network, transport, session, presentation, application: This option is incorrect. The order of the layers is incorrect, starting with the physical layer and ending with the application layer.

D. application, encryption, network, transport, logical link control, physical: This option is incorrect. The layer names are not correct, and "encryption" is not a layer in the OSI model.

Therefore, the correct answer is:

The Answer is: A. application, presentation, session, transport, network, data link, physical.

Which of the following operate at the presentation layer?

networking osi-model

  1. FTP and HTTP

  2. SMTP

  3. UDP

  4. midi and jpeg

  5. all of the above

Show answer
Correct Option: D

AI Explanation

To answer this question, you need to understand the different layers of the OSI model.

The presentation layer is the sixth layer of the OSI model and is responsible for the formatting and presentation of data. It ensures that data is presented in a format that can be understood by the receiving application.

Let's go through each option to understand whether it operates at the presentation layer or not:

Option A) FTP and HTTP - FTP (File Transfer Protocol) and HTTP (Hypertext Transfer Protocol) operate at the application layer, which is one layer above the presentation layer. Therefore, Option A is incorrect.

Option B) SMTP - SMTP (Simple Mail Transfer Protocol) also operates at the application layer, not the presentation layer. Therefore, Option B is incorrect.

Option C) UDP - UDP (User Datagram Protocol) operates at the transport layer, which is below the presentation layer. Therefore, Option C is incorrect.

Option D) MIDI and JPEG - MIDI (Musical Instrument Digital Interface) and JPEG (Joint Photographic Experts Group) are both file formats that operate at the presentation layer. They define how musical data and image data should be formatted and presented. Therefore, Option D is correct.

Option E) All of the above - This option is incorrect because not all of the options listed operate at the presentation layer. Therefore, Option E is incorrect.

The correct answer is Option D. MIDI and JPEG operate at the presentation layer because they define how musical data and image data should be formatted and presented.

Which of the following are transport layer protocols?
networking osi-model

  1. TCP and UDP

  2. ATM

  3. CISC

  4. HTTP and FTP

Show answer
Correct Option: A

Which of the following are considered to be the upper layer protocols?
networking osi-model

  1. presentation and session

  2. application and presentation

  3. application, presentation, and session

  4. application, presentation, session, and transport

  5. application

Show answer
Correct Option: C

Flow control takes place at which layer?
networking osi-model

  1. physical

  2. Network

  3. transport

  4. data link

  5. application

Show answer
Correct Option: C

Encryption takes place at which layer?
networking osi-model

  1. physical

  2. presentation

  3. application

  4. session

  5. data link

Show answer
Correct Option: B

The network layer uses physical addresses to route data to destination hosts.
networking osi-model

  1. True

  2. False

Show answer
Correct Option: B

Error detection and recovery takes place at which layer?
networking osi-model

  1. transport

  2. presentation

  3. data link

  4. netwrok

  5. application

Show answer
Correct Option: A
Explanation:

To answer this question, the user needs to know about the different layers of the OSI model and their functions.

Error detection and recovery are functions that are performed at different layers of the OSI model, but the most common layer where it takes place is the Transport layer.

Options A, B, and E are incorrect because error detection and recovery do not take place at the Transport layer.

Option C, Data Link layer is also incorrect, because this layer is responsible for error detection and correction only for the local network segment.

Option D, Network layer is also incorrect, because this layer is responsible for routing and logical addressing.

Therefore, the correct answer is:

The Answer is: A (Transport)

Which layer establishes, maintains, and terminates communications between applications located on different devices?

networking osi-model

  1. application

  2. session

  3. transport

  4. netwrok

  5. data link

Show answer
Correct Option: B

AI Explanation

To answer this question, you need to understand the layers of the OSI (Open Systems Interconnection) model.

The layer that establishes, maintains, and terminates communications between applications located on different devices is the session layer.

Let's go through each option to understand why it is correct or incorrect:

Option A) application - This option is incorrect because the application layer is responsible for providing services directly to the end-user applications.

Option B) session - This option is correct because the session layer is responsible for managing the communication sessions between applications, including establishing, maintaining, and terminating the sessions.

Option C) transport - This option is incorrect because the transport layer is responsible for providing reliable end-to-end data delivery and error recovery.

Option D) network - This option is incorrect because the network layer is responsible for routing packets between different networks.

Option E) data link - This option is incorrect because the data link layer is responsible for providing error-free transmission over a physical link.

The correct answer is B) session. This option is correct because the session layer is specifically designed to handle the establishment, maintenance, and termination of communications between applications located on different devices.