Back goes the loop

Published on September 16th, 2011 at 8:00 am

Last modified on August 13th, 2012 at 9:57 am

Which of these would be the best use of a loopback plug?

A) Check network connectivity from the LAN switch

B) Redirect printer jobs to a network printer

C) Check the error rates of a local network port

D) Convert a serial interface type from 9-pin to 25-pin

E) Keeps the hot side hot, and the cold side cold

The answer: C) Check the error rates of a local network port

A loopback plug takes the signal from a port or interface and redirects it back to the port. With the right diagnostics software, you can verify that the hardware interface is operating properly.

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.

Pages: 1 2


Category: CompTIA A+ Pop Quizzes

Comments are closed.