QUESTION 1:Refer to the exhibit. What could be possible causes for the "Serial0/0 is down" interface status?

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. A protocol mismatch exists.
D. An incorrect cable is being used.
E. There is an incorrect IP address on the Serial 0/0 interface.

Explanation:

As per the indication above exhibit it shows that link is down.If the link is down the protocol will never come
be up as Link is layer 1(Physical) and Line protocol is Layer 2(Data Link), when there is no physical connectivity there
wont be any logical one.

Layer 1 is down with one of below reasons,

1)Bad wiring i.e. not proper crimping of cables being used what ever might be the connectivity ethernet,E1 ..etv.
2)Cable mismatch between equipment of differnt layers or Same layers( Straight & cross Over).
3)Port type mismatch e.g: trying to connect serial ports to ethernet and vice-versa.