Final answer:
In North America, Wi-Fi networks operating at the 2.4 GHz frequency range can use a total of 11 channels, with channels 1, 6, and 11 being non-overlapping and most commonly used.
Step-by-step explanation:
In the 2.4 GHz frequency range, North American Wi-Fi networks can use a total of 11 channels. These channels range from channel 1 to channel 11, although channels 1, 6, and 11 are most commonly used because they are the only ones that do not overlap with each other, reducing interference. The other available channels overlap, which can cause co-channel and adjacent-channel interference, leading to a decrease in network performance.
These Wi-Fi channels are part of the Electromagnetic Spectrum and are regulated by the Federal Communications Commission (FCC) in the United States to avoid interference with other devices and services. Wi-Fi technology utilizes radio waves to provide wireless internet access within a certain range, acting similarly to how a radio station utilizes specific frequencies to broadcast its signal.