What's the difference between 802.11a, 802.11b, and 802.11g? The first difference is that 802.11a uses the 5GHz radio frequency (RF) spectrum while 802.11g and 802.11b share the 2.4GHz spectrum. Therefore 802.11a will not interfere with 802.11g or 802.11b. Since 802.11a uses the 5GHz spectrum, it will have less distance capabilities due the physical nature of electromagnetic radiation. 802.11b and 802.11g use an RF spectrum that allows for 3 non-interfering channels (in North America). 802.11a uses a wider spectrum that allows for 12 non-interfering channels which will be 23 non-interfering channels with soon to be released standard. The idea of non-interfering (or non-overlapping) channels allows more wireless users to be concentrated in an area without having to share the transmission medium. 802.11b, while sharing the same 2.4GHz frequency spectrum as 802.11g, has lower transmission rates and different modulation techniques than 802.11g. For a discussion of transmission ra
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