Which of the following is NOT a function of the Session Layer?

Let’s understand what the Session Layer actually does:

• Session termination: The Session Layer can end or close a session cleanly after data exchange is complete.


• Dialog control: It manages who can send or receive data during a session, controlling the communication direction (full-duplex or half-duplex).


• Synchronization: It places checkpoints during data transfer to help recover the session in case of failure.

What it does NOT do:

• Address resolution
  
• Address resolution is the process of mapping an IP address to a MAC address, and this function is handled by the Network Layer or through protocols like ARP (Address Resolution Protocol).

Conclusion: The correct answer is Address resolution. This task is performed at a different layer (Network Layer), not the Session Layer.