You are troubleshooting problems with a serial interface on a router that is connected to a leased line WAN interface.

You need to view the type of serial cable that has been used on the s$0/0/1$ interface and which end of the cable is connected to the DCE or DTE.

Which command should you use to do this?

answer

sh interfaces

sh run

sh controllers s$0/0/1$

sh ip interface brief