802.11 Unlicensed Bands
The use of radio waves (specifically, the transmission of radio signals) falls under the supervision of the FCC, which controls their usage through licensing. Most of the RF spectrum is licensed, with different frequency bands used for specific functions (radio, television, etc.). The licensed use of a frequency allows a government or commercial entity to employ its designated frequency without fear of interference.
There are also unlicensed bands on which users can operate without an FCC license. To do so, however, they must use certified radio equipment and must comply with certain technical requirements, including power limits. Those who use these unlicensed bands do not have exclusive use of the bands and are subject ...
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