Howstuffworks "How Municipal WiFi Works": "Wireless Standards
Wireless networking uses a range of standards -- the rules that routers and receivers use to communicate with each other. Most common are:
802.11a - 54 Mbps data rate in the 5 GHz band of the radio spectrum
802.11b - 11 Mbps, 2.4 GHz
802.11g - 54 Mbps, 2.4 GHz
802.11e - 54 Mbps, 2.4 GHz, with quality of service (QoS) protocols, which should improve VoIP and streaming media quality
A separate standard, 802.16 (or WiMAX), transmits at 70 Mbps and has a range of up to 30 miles. It can operate in licensed or unlicensed bands of the spectrum from 2-6 GHz. WiMAX typically links multiple 802.11 networks or sends Internet data over long distances. " A great website please take time to read it... David
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