The Cisco Catalyst 4500 Series Supervisor Engine V continues the nonblocking, robust Layer 2-4 switching found in previous Cisco Catalyst 4500 Series supervisor engines with additional performance, features, and throughput, further enhancing resilient control of converged data, voice, and video networks with high availability to help enable business resiliency for enterprise and metropolitan (metro) Ethernet customers. Network control extends from the backbone to the edge with intelligent services such as granular quality of service (QoS), Internet security, and network management.The Cisco Catalyst 4500 Supervisor EngineV offers port scalability for resilient Layer 2-4 and routing for both enterprise and service provider market segments. Optimized for the enterprise LAN access, branch-office backbones, or Layer 3 distribution points, the Cisco Catalyst 4500 Series Supervisor Engine V provides the performance and scalability to handle the network applications of today and the future.The Cisco Catalyst 4500 Series modular architecture provides a "pay-as-you-grow" model, reducing operational expenses and capital expenditures.