AirPort Extreme 802.11n(3rd Generation)

Background

On March 3, 2009, the AirPort Extreme was updated with simultaneous dual band 802.11n capability, remote AirPort Disk accessibility through Back to My Mac, and the ability to broadcast a guest network at the same time as an existing network. Simultaneous dual band effectively allows users to set up two WiFi networks (one on 2.4Ghz band, the other on 5Ghz band) using the same AirPort Extreme Base Station. This allows more effective partitioning of network. On October 20, 2009, Apple unveiled the updated AirPort Extreme Base Station with antenna improvements resulting in wireless performance gains of both speed and range.