[Sephiroth]

I'll elaborate on that. Assuming that your installation will use coax cable (as distinct from fibre), there will be a wall box on the outside of your house. Inside that wall box will be the incoming coax cable and a splitter.

As Paul says, the installer will run coax to wherever you want.

That means all you need to do is choose what to locate where and ensure that your structured Ethernet cable covers it all.