Which transport mechanism is used between a RADIUS authenticator and a RADIUS
authentication server?

A.
UDP, with only the password in the Access-Request packet encrypted

B.
UDP, with the whole packet body encrypted

C.
TCP, with only the password in the Access-Request packet encrypted

D.
EAPOL, with TLS encrypting the entire packet

E.
UDP RADIUS encapsulated in the EAP mode enforced by the authentication server.