Since the introduction of 802.11g each channel in the 2.4 GHz spectrum is 20 MHz wide. Therefore, in the US it is recommend to use channels 1, 6 and 11 to get maximum spectral use and to avoid deploying channels that will interfere with one another. To see why take a look a figure 1. Figure 1 STA's with overlapping channels will not defer to each when transmitting and will therefore, cause CCI (co-channel interference) which results in high retries and possible channel sat