Question: what is the difference between bandwidth 20mhz and 40mhz?
Answer: In addition to that, I would be better off choosing the 20Mhz channel width to decrease the amount of interference incurred by other devices. 40Mhz is best used with 5Ghz bands or uncrowded 2.4GHz bands. In crowded areas, it can be a “battle of air space” to stabilize your network.