Layer 5: session layer

     IN session layer it establishes, manage and terminate connection b/w application. The session layer sets up, co-ordinates and terminate conversations, exchange and dialogues b/w the application at each end.

  It deals with session and connection co-ordination.

 Session layer enables connection in different mode.

1.   Simplex

2.   Duplex

1.   Half duplex     2. Full duplex.