Session Layer (Layer 5)

At Session Layer of the OSI Model the user data is not being sent, it is just in the stream of bits.  Now these things happen at the session layer are to established, manage (synchronizing etc) and terminate the communication between the two devices. It is actually the introduction between the two devices and in this introduction the two devices that are involve in the communication are going to finds out, do they really can communicate with each other or not?

But remember it is just a preparation that how the devices are going to established, manage and terminate the connections between them. Suppose they can communicate about their speed means at what speed they can easily accept the data and they can communicate about length of the data and also when to cancel the communication. 

 

There are some protocols used in session layer that established, manage and terminate the connection between the two devices are given below

   ·        Remote Procedure Call (RPC)

   ·        Zone Information Protocol (ZIP)

   ·        Session Control Protocol (SCP)

   ·        Apple Talk Session Protocol (ASP)

   ·        Network File Services (NFS)