In choosing to define standards and frequency spectrum levels of this stands, the IEEE LAN/MAN Standards Committee chose to define a very broad public spectrum, which would allow for more efficient use of the standard for LA

and WAN deployments. The IEEE Standards Committee defined the range of 2.4GHz to 5 GHz as the public spectrum band that could be accessed and used for over-air modulation and demodulation. WiFi is the popular term used to refer to 802.11-based networks and their use at the lower ends of the public spectrum band.

The IEEE Standards committee also defined five variations of the 802.11 standard during its initial working sessions in the 1999 -- 2000 timeframe. The initial 802.11a standard was introduced in 1999, having an operating frequency of 5 GHz with a speed of 23 Mbits/second. The 802.11g standard was first introduced in 2003, and supported a 2.4 GHz operating frequency....
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