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session layer การใช้

ประโยคมือถือ
  • Session : Communications between applications across a network is controlled at the session layer.
  • The session layer of the OSI model is responsible for session checkpointing and recovery.
  • ICA supports the concept of channels at a session layer to encapsulate rich media redirection or USB extension within ICA.
  • Class 4 is closest to TCP, although TCP contains functions, such as the graceful close, which OSI assigns to the session layer.
  • The session layer provides the mechanism for opening, closing and managing a session between end-user application processes, i . e ., a semi-permanent dialogue.
  • OSI also explicitly distinguishes additional functionality below the application layer, but above the transport layer at two additional levels : the session layer, and the presentation layer.
  • Session layer functionality is also realized with the port numbering of the TCP and UDP protocols, which cover the transport layer in the TCP / IP suite.
  • Since the M-Bus is not a network, and therefore does not-among other things-need a transport or session layer, the levels four to six of the OSI model are empty.
  • Within the service layering semantics of the OSI network architecture, the presentation layer responds to service requests from the application layer and issues service requests to the session layer.
  • Within the service layering semantics of the OSI network architecture, the session layer responds to service requests from the presentation layer and issues service requests to the transport layer.
  • An example usage of the session layer is session beans, which are only active as long as the session is active, and are deleted when the session is disconnected.
  • Each Net-Lib supported network protocol has a separate driver ( not to be confused with a device driver ), and has support for a session layer in its protocol stack.
  • The functionality of the session layer can be found in protocols like HTTP and SMTP and is more evident in protocols like Telnet and the Session Initiation Protocol ( SIP ).
  • Since the failover procedure is highly application-dependent, it is not part of RSerPool itself, though RSerPool provides far reaching support for the implementation of arbitrary failover schemes by its Session Layer mechanisms.
  • Other examples of session layer implementations include Zone Information Protocol ( ZIP )  the AppleTalk protocol that coordinates the name binding process, and Session Control Protocol ( SCP )  the DECnet Phase IV session-layer protocol.
  • The TCP / IP model does not consider the specifics of formatting and presenting data, and does not define additional layers between the application and transport layers as in the OSI model ( presentation and session layers ).
  • KWP2000 can be implemented on CAN using just the service layer and session layer ( no header specifying length, source and target addresses is used and no checksum is used ); or using all layers ( header and checksum are encapsulated within a CAN frame ).
  • In the case of transport protocols that do not implement a formal session layer ( e . g ., UDP ) or where sessions at the application layer are generally very short-lived ( e . g ., HTTP ), sessions are maintained by a higher level program using a method defined in the data being exchanged.