That's not too far from the reality of it actually. The Deco system does a periodic DNS querey to test the internet connection. If the system recieves a response you see a green light. If it does not you see a red light. The red light doesn't actually mean there is no internet, just that something is wrong. In this case that could be that the DNS query is being blocked. I will not that this DNS querey does not establish a connection to any site or internet service, it simply is used to test the connection to the internet.