Chapter 4. Radio Frequency (RF) Fundamentals for Wireless LAN Technology
THE FOLLOWING CWTS EXAM OBJECTIVES ARE COVERED IN THIS CHAPTER:
Define basic characteristics of Wi-Fi technology
Range, coverage, and capacity
Frequencies/channels used
Channel reuse and co-location
Identify factors that affect the range and speed of RF transmissions
Line-of-sight requirements
Interference (baby monitors, spread spectrum phones, microwave ovens)
Environmental factors
Define the basic units of RF measurements
Milliwatt (mW)
Decibel (dB)
dBm
dBi
Unlike wired devices, which use physical cable to communicate, wireless LANs use the radio waves and the air to communicate. This ...
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