Session Layer Working of OSI Model || Networking Chapter IV Part 6 ||

                                                     OSI Model - Session Layer

#Summary - In this blog we will discuss about Session Layer

# Session Layer - This is the fifth layer of OSI Model. This layers establishes, manages, synchronizes and terminates connection between the computers.It also set up, coordinates and terminates interactions and dialogs between communicating devices. It provides either Half Duplex or Full Duplex Service.
Session Layer receives data from the presentation layer and adds header and synchronization bits to the data and passes data to the transport layer.

 At the receiver side, session layer receives data from transport layer and detaches header and synchronization bits from the data and passes data to the presentation layer.

* Responsibilities of Session Layer -

a) Synchronization - At the Session Layer, checkpoints are added into a stream of data to synchronize the sessions. For example, if a device is sending a file of 2000 pages, then you can insert checkpoints after every 50 pages to insure that these 50 pages received without an error and acknowledged independently.

b) Dialog Control - Session Layer allows two devices to enter into communication process and each device has a token during communication. When the communication is done token is passed on to next year.Communication can be either in half duplex or full duplex.





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In the next blog we will discuss about Presentation Layer...