That is true, image 3 is the Nest WiFi point. You can tell by the holes along the base. This image is incorrect.

Hello Anonymous, A couple of considerations: 1. two NATs in a row often do not work stably. However, both the Wingo router and the Google Nest have this switched on by default. The Nests need their own IP address management though, so that a mesh operation can work. Therefore, the suggestion to switch off NAT on the Wingo router (can also be called differently in the menu of the router) and to specify a fixed IP address. In this way, you switch off the actual router function. Leave the address assignment for the first Nest on dynamic ("NAT"). The second one must be set to "Bridge Mode". 2. on the cable side, you should connect a series as follows in your case: A) Wingo B) Nest (NAT) C) Nest (Bridge) If you want to connect additional Nest routers, you can either extend the row with further bridge modules or you can connect a switch (not a router!) between the first Nest and further Nest routers in bridge mode. In terms of cables, this would then be a star cabling. In any case, this works stably for me in the star.

The router must not be confused with the access point. The router does not have a loudspeaker. The access points do. Any number of access points (with loudspeakers) can be added to the router and, in addition to the loudspeaker function, also increase the WLAN.

Yes, I have a UPC Giga Connect Box. You should set the UPC box to bridge mode, otherwise you will have two routers connected in series. It works, I had to do it once because for some reason a friend's VPN connection to his employer didn't work via Google Wifi and I couldn't figure out why. Sunrise, for example, does not offer bridge mode with your modem, you simply have to deactivate the wifi, otherwise in the worst case the signals will interfere with each other. If it works, bridge mode is the recommended way to attach the Google Wifi.

Why a new network? For such cases there are extra W-LAN repeats. these pick up the signal and amplify it. I would recommend a network mesh, which means that you expand the existing network so that your devices automatically jump to the best signal without interrupting the connection. e.g.: AVM FRITZ.Repeater 2400 WLAN Mesh International / CH

They say you can mix the older Google Wifi model with the new model. Personally, I would buy a Google Nest router, you can try it out and decide which device is the main Wifi router. You can't run a Nest access point as a router.