You need a Router with wireless capability. There are many different makes and models out there ranging from as low as $20 to several hundred dollars depending on your needs, such Gigabit ports, dual band capability, usb port, built-in print server, etc. Some of the well know brands are Linksys/Cisco, Netgear, Dlink, TrendNet, Asus, Belkin, etc. I believe Cisco has a model of Routers called Valet that are aimed at non-techy people for easy setup. Just remember to setup the wireless security (this ability is built into the router and just needs to be setup. for example wpa2 is the type of security to use) to prevent people hacking into you network. I hope that helps a little.
Example:http://www.staples.com/Cisco-Valet-Plus ... -nr_857081