An administrator is troubleshooting a communication issue between two computers on the
same Layer 2 switch. Which of the following is the BEST way to determine if the switch is
causing the issue?

A.
Setup an ACL that allows and logs all IP traffic between the two computers

B.
Configure a spanning tree to check for a loop

C.
Setup a span port on the switch to watch for CRC errors

D.
Connect both computers using a crossover cable