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Decryption and encryption of data are responsibility of

  • A.physical layer
  • B.data link layer
  • C.presentation layer
  • D.session layer 

Answer: C

Correct answer: presentation layer

The presentation layer deals with the representation of data - character encoding, compression and encryption - so that the two ends interpret it the same way. Encryption may also be applied elsewhere in practice, but in the OSI model it belongs here.

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