Xbox consoles are the first video game system to feature a built-in Ethernet port. Two Xboxes can be networked directly using a System Link Cable (that is simply an Ethernet crossover cable). Alternatively, multiple Xboxes can be connected to the hub, switch, or router of a home network using regular Ethernet cables. The Xbox also supports wireless home networking with a Xbox Wireless Adapter that connects to its Ethernet port and communicates with wireless base stations.
To play Xbox games over the Internet, you must subscribe to the Xbox Live service. Not all Xbox games are available on Xbox Live. Likewise, only games that support the System Link feature can be played across two direct-connected Xboxes.