Various desktop computers are not getting a link light even though the patch cables were replaced.
Cables on a 110-block patch panel are suspected to be causing the issues. Which of the following
hardware tools would MOST likely be used to troubleshoot and resolve the issue? (Select TWO).

A.
Cable certifier

B.
Ping command

C.
Punch down tool

D.
Crimper

E.
Toner probe