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Session Layer

Session Layer(Layer 5): This layer lies between the Transport layer and the Presentation layer. It allows users of different machines to set sessions between them. It establishes, maintains and synchronizes the interaction among communicating devices. It manages communication sessions, i.e. continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes.
The functions of the session layer are:
  • Dialog Control: The session layer allows two systems to enter into a dialog. It allows the communication between the two processes in either half-duplex or full duplex.
  • Synchronization: It allows long transmissions to resume after a checkpointing.
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