What’s the best tool for this job?

You’d like to run some diagnostics on an Ethernet connection, but you need some additional hardware that will help the diagnostics software determine if the Ethernet traffic is sent and received properly. What’s the best tool to use for this job?

A) Multimeter

B) Crossover cable

C) Loopback plug

D) Ethernet tap

The answer: C) Loopback plug

Loopback plugs are nifty connectors that connect to a port and simply redirect all of the outgoing single back into the incoming pins. Diagnostics software can be configured to send traffic out of the port and examine the incoming loop to determine if the data is sent and received without any errors.

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

Every CompTIA A+ technology professional needs a tool bag with the right mix of diagnostic tools, specialty tools, and cleaning products. In this video, we’ll walk you through the must-have tools that you’ll need for everyday troubleshooting and preventive maintenance.