Use Web cameras to set up a home-security system. Share peripherals such as printers and scanners. Your computer and any peripherals you'd like to share, like a printer or scanner. Home networking also can be used to connect your stereo, burglar alarm, lights and other appliances. More networkable products are being introduced every month.
Ethernet uses the same cabling as an office building.
It's very fast, but usually requires additional wiring in your home. Phone lines use your home's existing telephone lines. Plug the computer or other device into a phone jack, which acts like a modem, and you can connect with any other phone jack in the home. A power line sends information over your home's electrical wiring. Plug an adapter into the wall, plug your device into the adapter, and you're up and running.