Cisco Secure ACS Solution Engine on the CSACSE-1112-K9 platform is a highly scalable, rack-mounted, dedicated platform that serves as a high performance access control server supporting centralized Remote Access Dial-In User Service (RADIUS) or Terminal Access Controller Access Control System (TACACS+). The Cisco Secure ACS Solution Engine controls the authentication, authorization, and accounting (AAA) of users accessing corporate resources through the network.The Cisco Secure ACS Solution Engine allows you to control who can access the network, to authorize what types of network services are available for particular users or groups of users, and to keep an accounting record of all user actions in the network. The solution engine supports access control and accounting for dial-up access servers, firewalls and VPNs, Voice-over-IP solutions, content networking, and switched and wireless local area networks (LANs and WLANs). In addition, the same AAA framework can be used, via TACACS+, to manage administrative roles and groups and to control how network administrators can change, access, and configure the network internally.The Cisco Secure ACS Solution Engine provides, as nearly as possible, the exact same features and functions of the Cisco Secure ACS for Windows Server (the software product) in a dedicated, security hardened, application-specific, appliance packaging. The solution engine includes additional features specific to operating and managing the Cisco Secure ACS Solution Engine.