The Equipment You'll Need
Clearly, the equipment you need depends on how you want to set up your network. If you are planning to add Wi-Fi to a wired network, in addition to all the equipment you need for the wired network, you need a Wi-Fi access point. As I've mentioned, you can also buy a single unit that works as a router for both wired and Wi-Fi computers.
In either case, you'll need Wi-Fi capability on each device that you want to connect to the Wi-Fi network. Of course, you don't have to worry about this with a Centrino laptopbecause wireless connectivity is already on board. You should know that it is easy to add Wi-Fi capabilities to other, older computersboth laptops and desktopssimply by adding a Wi-Fi card.
If you are not adding Wi-Fi to your network, but rather planning to create a completely wireless Wi-Fi network from scratch, you need a Wi-Fi router to connect to your modem.