Need more info. 722 has built in ethernet that can be accessed via the RJ port on the unit or through Powerline which requires a Powerline sender connected to the Internet.
If you want to go wireless you need a WAP - Wireless Access Point. Most wireless routers can be set as WAP. The easiest way to set up a WAP is to get a pair of matching routers. Online they should be in the $20 range. Use your computer to program both the WAP and router. Many say 802.11 G is the fastest speed the 722 can handle.