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1 COMPUTER NETWORKING MCQS

Which of the following is NOT a layer in the OSI model?

  • Transport Layer
  • Encryption Layer
  • Presentation Layer
  • Session Layer
Correct Answer: B. Encryption Layer

Detailed Explanation

The OSI model has 7 well-defined layers, and each one has a specific role in managing data communication between computers and devices. These layers are:




  • Application Layer

  • Presentation Layer

  • Session Layer

  • Transport Layer

  • Network Layer

  • Data Link Layer

  • Physical Layer



Encryption Layer is not one of the official layers in the OSI model. While encryption is an important part of networking, it is usually handled within the Presentation Layer or sometimes within applications themselves.



Each real OSI layer handles different tasks like formatting, session control, routing, and reliable data transfer. Knowing the correct names and functions of each layer is helpful when learning networking and troubleshooting issues.

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