I've heard of network extenders where the unit has one radio - and the device shares time for its single radio between being associated to the main Wi-Fi router / access point and handling the Wi-Fi signal for the extended range. AFAIK, these tend to slow down the network for clients in the extended range because the single radio's airtime is split between the main network and the extended network.
I've also heard of the same thing done with access points with two radios - one on the 2.4 GHz, and one on the 5 GHz spectrum. All the access points are part of an extended service set (ESS) - they have the same SSID, and they are all connected to each other with the backhaul network on the 5 GHz band. I think that clients can only associate with an access point on the 2.4 GHz band because the 5 GHz is used by the backhaul.
Knowing these options, does anyone know how exactly does Google Wi-Fi work? Does it use the single radio or the dual radio design above?
In the Google Wi-Fi setup, you have a main device where you plug in power and also the cable to your modem, but all the secondary devices only require a power plug. The only thing is that on Google Wi-Fi, clients can associate on both the 2.4 GHz and 5 GHz bands.
How does Google Wi-Fi communicate between the different "hockey puck" devices on its backhaul? I've tried Googling this info, but no luck.