4.3. Interpreting Visual Indicators in a Network
Sometimes you can solve a problem very quickly, if you just know what to look for on a device. Most devices such as routers, switches, hubs, and even network interface cards (NICs) have light-emitting diodes (LEDs) that can tell you quite a lot if you are "listening." In this section, we discuss the most common of these types of LEDs and what you can interpret from them.
4.3.1. Critical Information
You should know how to interpret the signals given by LEDs on devices in your network. We will focus on the most common types of LEDs: link LEDs and collision LEDs.
4.3.1.1. Link LEDs
You are not always in front of a computer when you are connecting network devices. Sometimes a computer is connected ...
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