Co-channel interference: When access points, whose coverage area overlaps,, are configured in the same channel or channels with overlapping frequencies, it causes connectivity issues for clients in the overlapping coverage area. In order to avoid this issue, either change the channel number to a non-overlapping channel, or move the access point farther away so that their coverage areas do not overlap. For example, in 802.11b/g, network channels 1, 6, and 11 are non-overlapping channels.
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