Which condition does the err-disabled status indicate on an Ethernet interface?
A.
There is a duplex mismatch.
B.
The device at the other end of the connection is powered off.
C.
The serial interface is disabled.
D.
The interface is configured with the shutdown command.
E.
Port security has disabled the interface.
F.
The interface is fully functioning.
why some websites chose A. there is a duplex is mismatch as the answer. Any advise for this