Network adapter problems
Two official Wi-Fi adapters are available for the Xbox 360, both of which connect through a USB port. The first version released supports 802.11a, 802.11b and 802.11g connections, features a single antenna and is only available in white. On October 5, 2009 Gamestop revealed a new version of the wireless networking adapter which features support for 802.11n networks in addition to those supported by its predecessor. This version features two antennas to ensure adequate 802.11n connectivity, and is only available in black. Encryption mechanisms available when using both versions were initially limited to WEP and WPA, with WPA2 support added on October 28, 2009 via a system software update.
In addition to the official Wi-Fi adapters, third-party wireless bridges may also be used with the Xbox 360. These are connected through the Ethernet port and recognized by the Xbox 360 as a wired connection, but offer the same or similar functionality. It is also possible to connect an Xbox 360 to internet through another system's connection by using connection sharing systems.
Using an official Wi-Fi adapter or third-party wireless bridge, the console can automatically detect and link up with other Xbox 360 consoles that are within range and form an ad hoc network.
In revised "slim" models of the Xbox 360, 802.11n connectivity is integrated into the console. However, the integrated adapter is only able to connect to 2.4 GHz networks, so the first-party adapter or a third party bridge is still required to connect to 5 GHz networks.