A user contacts a technician and states, "The network is down." After further investigation the user is unable to get to a file share on the LAN. Which of the following is the NEXT step the technician should take to help determine the root cause of the problem?

A.
Have the user ping the default gateway.

B.
Unplug and then plug the network cable back in.

C.
Reboot the core router.

D.
Have the user run netstat.