presentation layer
Presentation Layer:
The presentation layer provides a variety of encoding and encryption functions that are applied to the application layer data. These functions ensure that information sent from the application layer of one system will be readable by the application layer of another system. Some examplesof presentation layer encoding and encryption schemes follow:
Conversion of character representation formats :
Conversion schemes are used to exchange information with systems using different text and data representations (such as EBCDIC and ASCII).
Common Data representation formats :
The use of standard image, sound, and video formats (like JPEG, MPEG, and RealAudio) allow the interchange of application data between different types of computer systems.
Common Data Compression Schemes :
The use of standard data compression schemes (like WinZip or GZip) allows data that is compressed at the source device to be properly decompressed at the destination.
Common Data Encryption Schemes :
The use of standard data encryption schemes allows data encrypted at the source device to be properly unencrypted at the destination.