Recommended Approach to Prevent Co-Channel Congestion

A.

When installing access points that use the 2.4 GHz frequency, the recommended approach to avoid co-channel congestion is to use different non-overlapping channels.

The 2.4 GHz frequency band is divided into 14 channels, each with a width of 22 MHz. However, due to the overlapping of these channels, only three of these channels, 1, 6, and 11, are considered non-overlapping. Therefore, the best practice is to use these non-overlapping channels for adjacent access points to avoid co-channel interference.

If multiple access points use the same channel, they will interfere with each other and cause congestion, which can lead to slow network performance, dropped connections, and other issues. On the other hand, if access points use different non-overlapping channels, they can operate simultaneously without interfering with each other, which can improve network performance and reliability.

Therefore, option A, different non-overlapping channels, is the recommended approach to avoid co-channel congestion while installing access points that use the 2.4 GHz frequency. Option B, one overlapping channel, and option D, different overlapping channels, can both lead to co-channel interference and should be avoided. Option C, one non-overlapping channel, may not provide enough coverage for larger areas and may also lead to co-channel interference if adjacent access points are also using the same channel.