A. The time on the controller is outside of the certificates validity time interval, so the join phase failed.
B. The AP moved from this controller to its primary controller.
C. The controller rejected most of the discovery requests from the AP because they were not received on the management interface subnet. The AP failed to join the controller.
D. The AP successfully joined the controller.
E. The AP failed to join because the self-signed certificate of the AP on the controller was not correct.