Question

which channel is best for 5ghz band​

Answer 1

Answer:

WiFi channel width, let's recap what WiFi channels are. Essentially, WiFi channels are smaller bands within WiFi frequency bands that are used by your wireless network to send and receive data. Depending on which frequency band your router is using, you have a certain number of WiFi channels to choose from:

11 WiFi channels are in the 2.4 GHz frequency band

45 WiFi channels are in the 5 GHz frequency band

The key takeaway here is that some WiFi channels are better to use than others because of interference, specifically Co-Channel interference and Adjacent-Channel interference. In the former, devices are competing for time to talk on the same channel. In the latter, devices from overlapping channels are trying to talk over each other. You can avoid such interference by choosing to use a non-overlapping, uncrowded WiFi channel.

Additionally, there are reasons to use one frequency band over the other