what is difference between airport extreme and express
What is the difference between AirPort Express (802.11g) and AirPort Express 802.11n (1st Generation)? AirPort Express (802.11g) supports legacy WDS (Wireless Distribution System) only, while the AirPort Express (802.11g/n) can be added to an 802.11n Extended Wi-Fi Network.
AirPort Extreme. AirPort Extreme is also called AirPort. It refers to the wireless router introduced by Apple, Inc. It is based on Wi-Fi also known as IEEE 802.11 standard. The IEEE 802.11 protocol also includes 802.11b, 802.11n and 802.11g. In general, AirPort Extreme refers to the standard protocol or router or the expansion card.