The Cisco Systems Catalyst 3500 series XL is a scalable line of stackable 10/100 and Gigabit Ethernet switches that deliver premium performance, manageability, and flexibility, with unparalleled investment protection. This line of low-cost, high-performance switching solutions provides next-generation stackable switching. It allows management of all Cisco switched ports from a single IP address and provides interconnected switches with an independent high-speed stack bus that preserves valuable desktop ports. With the introduction of the Catalyst 3500 series XL and Cisco Switched Clustering technology, Cisco takes stacking to a new level. With Switch Clustering supported on all Catalyst 3500 XL, 2900 XL and Catalyst 1900 switches, users can manage over 380 ports from a single IP address, and connect all switches with a broad range of Ethernet, Fast Ethernet, and Gigabit Ethernet media regardless of physical location.Cisco offers you the Catalyst 3548 XL - a single-rack-unit (RU), stackable 10/100 and Gigabit Ethernet switch with 48 10BaseT/100BaseTX ports and two GBIC-based Gigabit Ethernet ports. The Catalyst 3548 XL is ideal for delivering dedicated 10- or 100-Mbps to individual users and servers in high-density workgroups from a stack, cluster, or standalone configuration. Built-in dual GBIC-based Gigabit Ethernet ports provide users with a flexible and scalable solution for Gigabit Ethernet uplinks and GigaStack GBIC stacking.