Which layer ensures two devices can communicate in either half-duplex or full-duplex mode?

What is duplex communication?

• Half-duplex: Data flows in both directions, but only one direction at a time (like a walkie-talkie).


• Full-duplex: Data flows in both directions at the same time (like a phone call).

How the Session Layer helps:

• It sets up, manages, and ends the session (dialog) between two devices.


• It determines if the devices will communicate in half-duplex or full-duplex mode.


• It ensures both devices understand how and when to send and receive data.

Why this matters:

• Correct duplex mode improves communication speed and efficiency.


• Prevents data collision or confusion during transmission.


• Useful in applications where timing and direction of data flow are important.

Conclusion: The correct answer is the Session Layer. It controls dialog types and ensures devices can communicate in half-duplex or full-duplex modes effectively. This layer is key in managing and organizing communication between systems in a network.