I've worked on only one system with a Hopper and some Joeys. There is a WAP specifically for the Joeys, and it's not connected to the internet. A separate modem/router supplies wifi for the internet in the house.
It was installed by Dish Network.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw