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单选题
After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"()
A

Layer 1 on the interface is up but Layer 2 is down.

B

Layer 2 on the interface is up but Layer 3 has not been configured.

C

The interface is administratively up but the link status is down.

D

The interface is up but has been administratively turned off.


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