Plug an adapter into the wall, plug your device into the adapter, and you're up and running. Wireless networks come in a couple of versions, but all use radio signals to connect your devices. Peripherals can be used by any computer on the network by connecting them directly to one computer. Then turn on the networking software's sharing capabilities. For example, a scanner could be connected to your home-office computer, and your daughter could access it from her upstairs bedroom.
Faster connections make communication easier.
A good rule of thumb is to select a solution whose data rate is faster than your broadband connection's speed. That way, your speed won't fall off when you're surfing the Web or doing something else on all of your computers. You'll also need a hub or bridge to connect to your broadband modem. Wireless home networks cost significantly more than other technologies. But if you have a laptop, the freedom may be worth the extra cost.