Session Layer

The session layer is te network dialog controller. It establish,maintain and synchronize the interaction between communicating systems.
The responsibilities of session layer are:

• The session layer allows two systems to enter into a dialog. It allows the communication between the two in half or full duplex. It called dialog control.
• It make synchronization checkpoints into a stream of data. The checkpoints can be specified by time limit or data limit.

                                          

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