Cisco® Secure Access Control System (ACS) is a centralized identity and access policy solution that ties together an enterprise's network access policy and identity strategy. Cisco Secure ACS 5.1 is a next-generation platform that delivers major capabilities, including:- A powerful, attribute-driven rules-based policy model that addresses complex policy needs in a flexible manner;- A lightweight, web-based graphical user interface (GUI) with intuitive navigation and workflow;- Integrated advanced monitoring, reporting, and troubleshooting capabilities for maximum control and visibility;- Improved integration with external identity and policy databases including Windows Active Directory and Lightweight Directory Access Protocol (LDAP)-accessible databases, simplifying policy configuration and maintenance;- A new distributed architecture for large-scale deployments.The appliance and VMware versions each include a Base license.