What are the ethernet ports on the HR34 and H24 used for?
Dont know don't have one.
The Hopper and Joey are made for an easy install for someone who has cable tv already wired.
If your are going to run Ethernet everywhere then why bother. Besides you should be able to extend the Ethernet over the coax system to the Joeys anyways, which might make it to have broadband in all your rooms without running new Ethernet to each room.