O'Reilly logo

How Secure Is Your Wireless Network? Safeguarding Your Wi-Fi LAN by CCNA Lee Barken - CISSP MCP, CPA

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Attenuation

One of the natural laws of RF energy is that the further away you are from the source, the weaker the strength of the signal. You may have noticed that the further away you are from an AP, the more likely you are to drop down into a slower data rate. Another way to understand this concept is to think about a flashlight; visible light and RF energy have similar properties because they are both waves, but with different wavelengths.

In Figure A.5, you will notice that the light from a bulb radiates equally in all directions. The closer you are to the light source, the more light waves you will receive.

Figure A.5. A light bulb radiates in all directions equally.

In Figure A.6, the light of the flashlight beam is focused in a specific ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required