HPE Aruba Certified Switching Expert (ACSX) — Question 34

What is RADIUS CoA (RFC 3576) used for?

Answer options

• A. To force the client to re-authenticate upon roaming to a new Controller.
• B. To authenticate users or devices before granting them access to a network.
• C. To validate a host address against a whitelist or a blacklist.
• D. To transmit messages to the NAD/NAS to modify a user's session status.
• E. To apply firewall policies based on authentication credentials.

Correct answer: D

Explanation

The correct answer is D because RADIUS CoA is specifically designed to send messages to Network Access Devices (NAD) or Network Access Servers (NAS) to change a user's session status without requiring re-authentication. The other options describe different functionalities related to RADIUS but do not pertain to CoA.