To verify the configuration of the router, which of the following tools should the technician use?

A technician is diagnosing an issue with a new T1 connection. The router is configured, the cable is connected, but the T1 is down.

To verify the configuration of the router, which of the following tools should the technician use?
A . Loopback adapter
B . Cable tester
C . Tone generator
D . Multimeter

Answer: A