... servers.Active Directory® directory service:Active Directory is the Windows directory service that stores cre-dentials for VPN and 802.1X-based connections and Group Policy settings for IPsec-based ... serverWhen performing network access validation for a NAP client, the NPS server might have to contact a policyserver to obtain information about the current requirements for system health. For example, ... Administrator can configure enforcement policies with technolo-gies using IPsec Enforcement,802.1X Enforcement, VPN Enforcement, and DHCP Enforcement. Any one orcombinations of enforcement...