01. 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.

Read the rest of this entry »