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While we're on this topic... What's the deal with having multiple wifi access points with the same SSID? I have heard some people say you should always use a single SSID because the clients know how to automatically pick the best one. But I have heard others disagreeing and saying that to ensure you're using the right access point you need to use different names for each one and also 2.4ghz vs 5ghz. Anyway, who's right here?

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You should use the same SSID for 2.4GHz and 5GHz. You should also use the same SSID for all APs if they support roaming. Unifi does, for example. If you just get two random independent wifi routers, they won't and you might stay connected to the wrong antenna for a while.

https://community.ui.com/questions/Wireless-LAN-Roaming-FAQ/...

Some cheap IoT hardware seems to be incapable of connecting to a mixed network, and I have had to have a dedicated 2.4 only SSID for them.

I use a separate 2.4GHz-only SSID and VLAN for my IoT devices, because I just don't trust them.

All five APs in the house use the same SSID. Four of them have both 2.4 and 5Ghz radios; they use the same SSIDs. All of them are connected via ethernet to the switch.

It all works very nicely.

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