Cisco's Catalyst 2900 Series XL is a full line of 10/100 autosensing Fast Ethernet switches that offer outstanding performance, versatile modularity, and easy-to-use management.A 24-port switch with 22 10BaseT/100BaseTX autosensing Fast Ethernet ports and two 100BaseFX ports, Catalyst 2924C XL is ideal for delivering low-cost, high-performance, 10- or 100-Mbps bandwidth to individual users and servers.Switches running standard software are designated by the letter A, and switches running Enterprise Edition Software are designated by the letters EN.