The OSI representation layer protocol is located in the seven-layer reference model representing the layer, and the information transmission process between the open system is achieved by facing the connection or connectionless mode. The application protocol is defined using the user data parameters indicating the service primitive between the application entity.
Represents the PS user, the representation has the following two functions:
Transmission protocol negotiated syntax transmission conversion grammar
The transmission syntax protocol function is supported by representing protocol support, and the conversion syntax function is indicated by the entity limit, and has no impact on the design of the protocol. For connectionless transmission mode, the transmission representation entity uses a conversion syntax without conversion syntax negotiation.
A set of representations related to the application protocol defines a set of abstract syntax. If two application entities want to successfully implement communication, they must be consistent on abstract syntax settings. They may modify this consistency during communication. Therefore, in actual use, the setting of abstract syntax may change. Abstract syntax specification can be used to identify setting information content indicating data values. When the data value is indicated in the transition, the abstract syntax specification cannot recognize the conversion syntax, and it is independent of the re-representation of the local representation data value. For more information, please visit the following page: 中文 版: http://www.networkDictionary.com/chinese/protocols/pp.php English version: http://www.networkDictionary.com/protocols/pp.php
