In 2.4 GHz 802.11 networks, which set of channels are nonoverlapping?

In the 2.4 GHz band, each Wi-Fi channel is 22 MHz wide, but the channels are spaced only 5 MHz apart. This overlap causes interference if adjacent channels are used in the same area. To avoid this, non-overlapping channels are selected. Channels 1, 6, and 11 are the only three channels in the 2.4 GHz band that are spaced far enough apart (25 MHz between their center frequencies) to be completely non-overlapping. This allows for optimal performance by minimizing co-channel interference. Options like 1, 5, and 10, or 1, 5, and 11, or 1, 6, and 10, involve channels that partially overlap, leading to reduced throughput and reliability.