When two channels overlap, this degrades the signal and causes interference. The Federal Communications Commission (FCC) is in charge of regulating all communication frequencies.
Wireless local area network channels using IEEE 802.11 protocols are sold mostly under the trademark WiFi.
The 802.11 workgroup has documented use in five distinct frequency ranges: 2.4 GHz, 3.6 GHz, 4.9 GHz, 5 GHz, and 5.9 GHz bands. Each range is divided into a multitude of channels. Countries apply their own regulations to the allowable channels, allowed users and maximum power levels within these frequency …