简答题 AAA authentication login做什么用？

A.Log
B.Log-input
C.Log-output
D.Logging

A.Port 3/12 was already up and forwarding before the loop was created.
B.Port priority is based on lowest priority and lowest port number.
C.You connected the wire on port 3/18 last.
D.None of the above， it is purely random.