Most of use know WiFi can be done on bands other than 2.4 GHz.
But how many are there? Two? Three? More?
Here is a place for more information without too much heady tech.
List of WLAN channelsHowever, you will have a hard time finding routers and adapters that cover more than three bands.
The main reason for using other bands is to avoid interference in a urban location. Do not expect to use any unlicensed band for long range wireless.
Do you use any of the other bands other than 2.4 GHz and 5 GHz?
Why? How?