The Cisco CSS 11501 Content Services Switch is a compact fixed-configuration platform that delivers rich Layer 4-7 traffic management services for e-business applications. The Cisco CSS 11501 is appropriate for load balancing small web server clusters, supporting eight 10/100 Ethernet ports and one Gigabit Ethernet port though an optional small-form-factor, pluggable gigabit interface converter (SFP GBIC). For medium- and large- data centers - requiring greater performance, higher port densities, and modularity.