Turn on your NIC light

Many network interface cards include a status light on the RJ-45 port. What do these lights often signify? Pick two.

A) Signal link

B) Error packets

C) Network activity

D) Packet size

E) They’re synchronized to the Barry White channel of your Pandora account

The answers: A) Signal link and C) Network activity

A network card status lights is used quite often when installing or troubleshooting network connections. With a quick glance, you can see if the network link is physically connected or if there’s any network traffic across the link. The lights can also sometimes describe the speed of the network connection (i.e., green=100 mbps, amber=1 gbps).

Want to know more? Watch “Hardware Issues.”

Hardware issues can impact performance, cause application glitches, or render a PC completely unusable. In this video, you’ll learn how to identify hardware problems such as excessive heat, noise issues, and audible alerts.