Which of the following is the OSI layer that handles file compression such as LZMA or DEFLATE?

A.
Layer 3

B.
Layer 5

C.
Layer 6

D.
Layer 7

Explanation:
The presentation level is translator between the application and network format. Unlike the lower
layers, its concern is with the syntax and semantics of the information transmitted. Most user
programs do not exchange random binary bit strings. They exchange data such as names,
addresses, dates, etc. Different computers store the data in a different way. In order to allow these
computers to transmit the data to each other the presentation layer translates the data into a
standard form to be used on the network. Another function is data compression which can be used
to reduce the number of bits needed to send the packet of information. Security is also added at
this layer by using data encryption and decryption. This prevents others from intercepting the data
and being able to decipher the meaning of the bits.