In which of these cases would you be most likely to use a loopback plug?
A) Connect two Ethernet devices directly together
B) Test power supply voltages
C) Perform diagnostics on an Ethernet adapter
D) Determine the pinouts of an Ethernet cable
E) Redirect network traffic to a protocol analyzer
F) I like the Froot Loopbacks
The answer: C) Perform diagnostics on an Ethernet adapter
Loopback plugs are useful for testing physical interfaces on devices. Loopback plugs are commonly used for serial connections, Ethernet interfaces, and WAN connections.
Want to know more? Watch “Hardware Troubleshooting Tools.”
If you need to troubleshoot your computer, then you’ll need the right tools for the job. In this video, you’ll learn about multimeters, power supply testers, loopback plugs, and POST test cards.