Q15,paper2,June12.Decryption and encryption of data are the responsibility of which of the following layer ?

Options (A) Physical layer      (B) Data Link layer     (C) Presentation layer             (D) Session layer
Answer © Presentation layer.
1.Presentation layer provides the  following
Character code translation: for example, ASCII to EBCDIC.
2.Data conversion: bit order, CR-CR/LF, integer-floating point, and so on. 
3.Data compression: reduces the number of bits that need to be transmitted on the network.
4. Data encryption: encrypt data for security purposes and decrypt at another end.