What are the main frequency bands used by WiFi?

WiFi primarily operates in two main frequency bands: 2.4 GHz and 5 GHz. The 2.4 GHz band (2.400-2.4835 GHz) offers better range and wall penetration but is more congested and has limited bandwidth. The 5 GHz band (5.150-5.825 GHz) provides higher data rates and less interference but shorter range. WiFi 6E and WiFi 7 also use the 6 GHz band (5.925-7.125 GHz) for even more bandwidth and channels. The 2.4 GHz band has 14 channels (only 3 non-overlapping), while 5 GHz has many more non-overlapping channels.