The
Session Layer (Layer 5 of the OSI model) is responsible for managing dialogs between two devices. One of its important roles is deciding how communication takes place—either in
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.
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