how many channel is there in wireless network
In the 2.4 GHz spectrum, there are 14 channels ranging from 2.412 10 2.484 (called the Industrial, Scientific and Medical Band or ISM)
Channels 1 - 11 are available for use in the US
Channels 1-13 are available outside of the US
Channels 1-14 are available for use in Japan
Channels can be bonded up to 40 MHz wide (802.11n)
In the 5 GHz spectrum there are 57 channels with varying degrees of usage based on country.
In this US there is the U-NII-1, U-NII-2 and U-NII-3 bands with 45 channels available
Channels can be bonded in 40,80,160 MHz wide
Great question and keep them coming.
I would also add that in the US the only 3 tru non overlapping channels are 1,6,11 on the 2.4ghz band