A:AnswerThese are routers. Of the three, one is directly wired to your modem. This one is the "gateway" eero. The others can be wired to this gateway, or can be set up wirelessly. They all will communicate with each other, but the gateway is the one broadcasting to the rest. You can add more eero's if you need more coverage. According to eero, all eero's will work with any other eero's, as well. Maybe you just need to re-position your eero's to have better overlapping signals.
A:AnswerYes, you can replace your current gateway eero with this eero 6. That's what I have done, which was recommended by eero tech support. My other three eero's are eero pro's (2nd gen). I've had this setup for a couple weeks. So far, it works great.
A:AnswerYou can set a wifi password for the main network using the eero app under Settings->Wifi Password. You can setup the Guest network's name/password in Settings->Guest Access.
