The media-independent architecture of the Catalyst 5000 Family supports any type of data communication, including all legacy LAN and Asynchronous Transfer Mode (ATM) switching technologies through a wide range of Ethernet, Fast Ethernet, Gigabit Ethernet, Fiber Distributed Data Interface (FDDI), Token Ring, and ATM switch modules.Various Switching Modules delivered by Cisco for its Catalyst 5000 Multilayer Switches satisfy the specific customer needs for flexibility and expandability of their Cisco branded network hardware.