April 2009
Intermediate to advanced
765 pages
19h 26m
English
book
CWNA®: Certified Wireless Network Administrator Official Study Guide
by David D. Coleman, David A. Westcott
Content preview from CWNA®: Certified Wireless Network Administrator Official Study Guide
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Chapter 2. Radio Frequency Fundamentals
IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:
Definition of radio frequency signal
Radio frequency characteristics
Wavelength
Frequency
Amplitude
Phase
Radio frequency behaviors
Wave propagation
Absorption
Reflection
Scattering
Refraction
Diffraction
Loss (attenuation)
Free space path loss
Multipath
Gain (amplification)
To fully understand the 802.11 technology, you need to have a clear concept of how wireless works at the first layer of the OSI model, and at the heart of the Physical layer is radio frequency (RF) communications.
In a wired LAN, the signal is confined neatly inside the wire, and the resulting behaviors ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.