Radio spectrum is divided up into channels. In the 2.4 GHz spectrum there are 14 channels, with channels 1, 6, 11 and 14 being non-overlapping. As described above in terms of bandwidth, the first channel in the 802.11g protocol begins at 2.400 GHz and ends at 2.422 GHz for a total bandwidth of 22 MHz. The first channel is then described as being centered at 2.412 GHz.