Refer to the exhibit. What could be possible causes for the “Serial0/0 is down” interface status?
(Choose two.)

A.
A Layer 1 problem exists.

B.
The bandwidth is set too low.

C.
There is an incorrect IP address on the Serial 0/0 interface.

D.
An incorrect cable is being used.

E.
A protocol mismatch exists.

Explanation:

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm