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Layer 6 refers to the sixth layer of the Open Systems Interconnect (OSI) Model, and is known as the presentation layer. Layer 6 provides the separation in the differences of data representation, such as encryption, through transformation of that data from application data format to a network-ready format and vice-versa. It transforms data into a form that the specific application can accept and also takes the application’s data and encrypts it to be sent over a network so that it is free from compatibility issues.
Layer 6, or the presentation layer, serves as the data translator between an application or process and the network. This layer is responsible for the formatting and subsequent delivery of data to the application layer either for processing or display. This is so that the application layer does not have to bother itself with syntactical differences in data representation in end-user systems. A good example of this presentation service offered by layer 6 is the conversion of an EBCDIC-coded file into an ASCII file.
Layer 6 is the lowest layer which high-level language programmers concern themselves with, by considering data structure and presentation as opposed to just sending application data as datagram or packets between communicating nodes.
Services offered by layer 6 include:
Protocols used include:
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