The F1 32-port GE and 10 GE line card module is a layer 2 module and used for access switch connectivity. All Nexus line cards are wire rate non-blocking (no oversubscription) except those noted. In addition the line cards specify chassis type and platform support. The Nexus switches use a distributed architecture for all layer 2 and layer 3 forwarding. That means each line card does all the layer 2 and layer 3 forwarding of packets without using the supervisor engine. It is similar to the Cisco 6500 switch dCEF architecture. Some of the Nexus platforms have additional slots for fabric modules that increase the line card data throughput.