That's good point. Thinking logically, how could Guest Network will be isolated from Main Network in AP mode, if it is the modem/router to which Main Deco is connected that manages the network? Guest...

@TP-Link_Deco There is nothing wrong with doing DNS lookups to check basic Internet connectivity, but it is polite to do that against your own domains. So, if you please pass that as a feature...

If these are Windows laptops, you can google this and see if proposed solutions can help: "Internet or WiFi gets disconnected after Sleep in Windows 10"

@tijssens I am assuming your Internet connection speed is 500 Mbit or more, because if it less, WiFi 6 might not give you any benefits over WiFi 5. It also depends if you are heavy professional user...

@mno101 If you plan to use your Deco in router mode, these are my answers on your questions. > Will this cause a problem because there are effectively 2 routers in operation Depends on the definition...

@mno101 Ask yourself what do you need from Deco M9. If you were happy with your existent network configuration and settings, only needed WiFi mesh add-on - I suggest you configure Deco in AP mode....