The output of the Router# show interfaces serial 0/1 command displays the following: Serial0/1 is up, line protocol is down. What is the most likely cause for the line protocol being down?


Serial0/1 is shutdown.
There is no cable connecting the routers.
The remote router is using serial 0/0.
No clock rate has been set.

ccna exploration 2 chapter 2 Exam Question And Answers 

The output of the Router# show interfaces serial 0/1 command displays the following:  Serial0/1 is up, line protocol is down. What is the most likely cause for the line protocol being down?


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