My home network begins with my ISP, or the internet service provider, mine being Verizon. First it's connected to my modem/router combo by the Ethernet cable, which then connects to the desktop computer and home phone. I also have wifi connecting any laptops, cellphones, gaming devices and TV's in the house.
I have learned quite quickly that the rather unorganized network of cables in my dinning room is actually a lot more complicated than it already looks. There's a huge bundle of inner connecting wires that pull everything together in the end.
Everyone should really know that the ISP network is very complicated and very important. Without it, you wouldn't have internet at all, and frankly I doubt anyone could live without it.