The Cisco Catalyst 4948-E is a wire-speed, low-latency, Layer 2-4, 1 rack unit (RU) fixed-configuration switch for rack optimized server switching. The Cisco Catalyst 4948-E offers exceptional performance and reliability for low density, multilayer aggregation of high performance servers and workstations. High performance and scalability of intelligent network services is made possible with dedicated specialized resources known as ternary content addressable memory (TCAM). Ample TCAM resources (64,000 entries) enable "high feature capacity", which provides wire-speed routing/switching performance with concurrent provisioning of services such as QoS and security. This helps ensure scalability for today's network requirements with ample room for future growth.