Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "How WiFi Works - Computerphile" video.

  1. If they’re sharing the same band, then they’re contributing to interference and reducing your bandwidth, even if they’re using an entirely separate protocol.
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  2. Added complication: those channels overlap. For example, with the original 802.11b on 2.4GHz, there are supposed to be 11 channels, but in fact there is only room for 3 entirely separate channels -- 1, 6 and 11. So all the others overlap one of these (and each other) to quite a large extent.
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  3. Isn’t there such a thing as an echo-cancellation microphone? The front one picks up your voice, the back one picks up the room reverb, and by subtracting the latter from the former, you get a much clearer, less boomy recording.
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  4. That sounds like an OS protocol stack limitation.
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  5. What @sporqist  said! One end or the other has to initiate the broadcast so the other can find it. Better for it to be the access point than your mobile device. Otherwise your device will be broadcasting the name of your home network wherever you take it. There was this peculiar thing called the “Free Public Wi-Fi” bug, back in the days of Windows XP, as I recall; all these devices were going around trying to connect to a network with that name, and nobody could figure out why. As one device broadcast that name, others would pick it up and try to connect to it too, and so the “infection” would spread.
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  6. Should two-foot thick logs make that much difference? Unless their moisture content is a bit high ...
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