Access Control clients are a critical element of the HP ProCurve Access Control Security solution. They provide a comprehensive solution to the network access control problem in a multi-platform environment. The Access Control Security solution provides wide support to most customer authentication needs with support for operating environments including Microsoft Windows 98, Microsoft Windows 2000, and Microsoft Windows XP; Red Hat Linux; and Apple Mac OS. In addition, the back-end interoperability with leading RADIUS authentication vendors completes an industry-leading Access Control Security solution.