The main function of this layer is to define data formats, coding, and conversion functions that are applied to application layer data. These functions ensure that information sent from the application layer of one system would be readable by the application layer of another system. Encryption and compression of Data are also defined as Presentation layer functions.
Some popular implementations of the Presentation Layer are well-known standards such as QuickTime and MPEG, Graphics Interchange Format (GIF), Joint Photographic Experts Group (JPEG), and Tagged Image File Format (TIFF).
Examples of Layer 6 Standards