How many non-overlapping channels are in the 5 GHz band?

The correct answer is based on the understanding of the 5 GHz band and how it is categorized for wireless communication, particularly in standards such as IEEE 802.11. The 5 GHz band offers a wider range of frequency channels compared to the 2.4 GHz band, which allows for more non-overlapping channels.

In the 5 GHz frequency range, there are several channels that can be used, particularly in the Unlicensed National Information Infrastructure (U-NII) bands. For instance, in the U.N.I.I. bands, you typically find channels spaced apart by 20 MHz. When you calculate the non-overlapping channels considering the configuration where channels each occupy a 20 MHz bandwidth (with an essential gap to prevent interference), you end up with a total of 24 non-overlapping channels available. This is why the answer of 24 is the most accurate number regarding non-overlapping channels in the 5 GHz band.

The choice indicating fewer channels, such as 12 or 18, would not account for the full spectrum available in the 5 GHz band under current regulations and typical channel setups. Thus, the context of the 5 GHz band usage aligns with 24 non-overlapping channels being recognized and utilized in