单选题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?（）ASetup an ACL that allows and logs all IP traffic between the two computersBConfigure a spanning tree to check for a loopCSetup a span port on the switch to watch for CRC errorsDConnect both computers using a crossover cable
单选题
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
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