A variety of switched Ethernet and Fast Ethernet modules enable high-performance desktop connectivity with support for value-added features including multicast, protocol filtering, and quality of service (QoS). With the Catalyst 5000 Family, Cisco provides a cost-effective, switched Ethernet and 10/100 alternative to shared hubs in the wiring closet.Used in conjunction with the NetFlow feature card (NFFC or NFFC2), Fast Ethernet switching modules have specialized hardware to enhance multilayer switching performance. These Fast Ethernet switching modules utilize dedicated hardware per port to support distributed multilayer switching functionality, thereby increasing the overall multilayer forwarding performance of the system. With NFFC technology and the Fast Ethernet switching modules, the Catalyst 5000 Family platforms support wire-speed multilayer switching, with the full support of Cisco IOS routing protocols and the delivery of critical services such as access lists and class-of-service (CoS) differentiation.