What is the purpose of the uncontrolled port in the 802.1X authentication process?

A.
The authenticator uses this port to communicate with the authentication server

B.
The authenticator and the supplicant use this port to exchange EAP packets

C.
The authentication server blocks this port if authentication is unsuccessful

D.
The supplicant uses this port to send and receive data after the authentication process is
successful

Explanation:

Uncontrolled port
802.1X secures the network from the moment the supplicant connects by deactivatingthe
controlled port. The uncontrolled port is always active, but it can carry only theEAP packets used
for authentication.
Without the uncontrolled port, this high level of security would shut out all traffic fromusers,
preventing even authorized users from proving that that they are authorized.