The Cisco Catalyst 4500 Series Supervisor Engine II-Plus is a Cisco IOS software-based supervisor engine that meets the needs of value-conscious customers seeking a flexible and scalable LAN solution. Optimized for wiring closets for medium-sized enterprises, education customers, or small enterprises or branch offices, the Supervisor Engine II-Plus provides the resiliency and control for converged data, voice, and video networks.The Supervisor Engine II-Plus delivers non-blocking Layer 2 switching with basic Layer 3 and Layer 4 intelligent services to power resilient, multilayer switching solutions for converged data, voice, and video networks. It allows customers to deploy network-wide intelligent services, such as advanced quality of service (QoS), comprehensive security, and management with optimal control and resiliency. Supervisor Engine II-Plus helps to ensure an extended window of deployment of the modular Cisco Catalyst 4500 Series.