The exhibit shows the status for one of the user’s clients. The controller system logs show
RADIUS failure: however users never receive messages on their clients that state that they have
entered the wrong credentials. The network administrator creates a new account and tries logging
win with it, and the connection still fails.
Based on this information, what might be the problem?

A.
The controller has lost connectivity with RADIUS servers.

B.
The tagging on the APs switch ports is incorrect.

C.
The controller uses a certificate for RADIUS that the clients do not trust.

D.
The clients support the wrong form of encryption.

Explanation: