Apple AirPort Extreme AirPort Extreme is a fully featured Wi-Fi base station that provides simultaneous dual-band wireless networking using the 802.11ac specification. When you set up your AirPort Extreme, it creates two high-speed Wi-Fi networks: A 2.4 gigahertz (GHz) network for 802.11b, 802.11g, and 802.11n devices, such as iPhone, iPod touch, and older computers A 5 GHz network for 802.11n, 802.11a, and 802.11ac devices, such as iPhone, iPad, Apple TV, and newer computers Wi-Fi devices automatically join the network that provides the best performance and compatibility, and AirPort Extreme shares your broadband Internet connection with computers and devices on your network.