The 16-port Fast Ethernet interface modules provide full wire-speed Layer 3 switching and support 16K or 64K IP/IPX entries depending on the size routing table required. Both 10/100 Base-TX and 100 Base-FX (full duplex only) versions are available. A version of Fast Ethernet cards is available with a pre-installed access control list (ACL) daughter card when data path ACL functionality is required. The primary application for these modules is non-blocking, wire-speed Fast Ethernet aggregation.