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计算机
Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
admin
2009-05-19
40
问题
Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
选项
A、Serial0/1 is up, line protocol is down
B、Serial0/1 is down, line protocol is down
C、Serial0/1 is up, line protocol is up
D、Serial0/1 is administratively down, line protocol is down
E、None of the above
答案
B
解析
Explanation:
When the physical interface itself is down, then the problem is related to layer 1. When it is up, but the line protocol is down, then the problem is related to layer 2.
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