The other left lane

In which of these situations would you use a loopback plug?

A) You need to monitor the data on a SATA connection

B) You need to run a diagnostic on an Ethernet port

C) You need to terminate a SCSI chain

D) You need to modify the resolution of an LCD monitor

E) You need to recalculate the route on the turn you just missed

The answer: B) You need to run a diagnostics on an Ethernet port

A loopback plug works in conjunction with a diagnostics process to determine if the data sent over a connection is properly received after looping back through the plug.

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A well-equipped toolbag is an important part of any CompTIA A+ certified professional. In this video, you’ll learn which tools can help you with your day-to-day installation and troubleshooting tasks.