- But if you are using 20 MHz on too few antennas per area and you have allowed alot of bandwidth for every individual user you could easily run into max airtime when users start downloading stuff. both APs and clients are welcome to select 40MHz or 20MHz rates. There are rate control algorithms on both end that won't even choose 80MHz MCS Muchos fabricantes de routers se han adaptado a la norma, por lo que no permiten que los usuarios seleccionen arbitrariamente los 40 MHz, sino que se limitan a un «Auto 20/40». Por lo tanto, si usted tiene la entrada «Auto 20/40», el router sólo utilizará 40 MHz si los canales vecinos sólo «libre» de lo contrario, utilizará 20 MHz By default, the 5GHz frequency uses a 20 MHz channel width. A 20MHz channel width is wide enough to span one channel. A 40 MHz channel width bonds two 20 MHz channels together, forming a 40 MHz channel width; therefore, it allows for greater speed and faster transfer rates. WiFi Scanner makes it easy to see who using what channel width.
\n \nwifi 20mhz vs 40mhz
Learn when to use 20 MHz, 40 MHz or 80 MHz Wi-Fi channel widths for optimal Wi-Fi performance and range. Compare the advantages and disadvantages of 2.4 GHz and 5 GHz bands, and the tradeoffs of different channel widths in 80 MHz Wi-Fi.

For 2.4Ghz stick to 20MHz channels on 1,6,11 only. If you're in a country that allows above 11 you may have more options but channel 2/4 will overlap and cause more interference. Generally it's recommended not to use auto channel selection. For 5GHz, use wider channels and use that for higher bandwidth applications/devices.

In a very busy/noisy environment, including when the bandwidth crowding is self-inflicted due to specific very dense AP environments, I have found that 40mhz bands or even 20mhz bands provided a better experience and provided more bandwidth than the vast majority of users ever actually tried to use day to day. DxUvwk.
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    • wifi 20mhz vs 40mhz