This has traditionally been done with  network cabling, not always a suitable method in your home. There are some alternatives, wireless or even using your mains 240v electric ring main to shunt the data around your home, or a combination of both. The mains power method works providing you are running just one ring main not so much an issue in modern houses. Larger older houses generally will need a look at before we come up with a suitable solution, but these days, a solution for any building is possible.

The advantages of a network are:

• sharing a printers
• sharing a data
• backing up on a network storage unit
• running a server running Microsoft’s new home server .This would mean being able to backup all your data and sharing you movies , music and other media around the house.