Session layer Functions and Services

Functions and Services,

 

• Partitioning of services into functional groups
  
• Acknowledgements of data received during a session
  
• Virtual connection between application entities
  
• Authentication
  
• Session restoration (check pointing and recovery)
  
• Three way handshake
  
• Multiplexing
  
• Virtual circuit management
  
• Error checking and recovery flow control 
  
• Synchronization of data flow
  
• Creation of dialog units
  
• Connection parameter negotiations
  
• Establishing connections
  
• Maintaining connections
  
• Synchronizing communications
  
• Controlling dialogues
  
• Terminating connections
  
• Retransmission of data if it is not received by a device
  
• Name service for name registration and resolution
  
• Session service for Connection Oriented Communication
  
• Datagram distribution service for connectionless communication.