What is a loopback plug used for?

A useful component to keep in your toolbag is a loopback plug. What is a loopback plug used for?

A) Measuring voltage

B) Testing network throughput

C) Measuring disk utilization

D) Testing physical ports

E) Allows you to look forward and backward at the same time

The answer: D) Testing physical ports

The loopback plug is often used in conjunction with diagnostics software to test the ability of a port to properly send and receive traffic.

Want to know more? Watch “The A+ Toolbag.”

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.