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This is probably the BEST written and explained article about real world WiFi usage, how it works, frequencies, attenuation by obstacles, etc I have ever seen.

arstechnica.com/gadgets/2020/0

@snow The 5 GHz band is really good for people in apartment buildings - where the amount of competing networks in the crowded 2.4 GHz band is a nightmare.

As long as your devices support the dual band, the 5 GHz can help. Less distance covered, weaker signal, but less collisions and interferance.

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