The process of confirming the identity of a user, typically by a username and password. Windows Server 2003 supports several authentication methods, including Kerberos v5, NTLM authentication, passport authentication, and digest authentication.
authorization
The process of granting or denying a user, group, or computer access to network resources through permissions and user rights.
automatic updates services
Enables operating system updates to be downloaded and installed automatically. This ensures that systems stay up-to-date with the latest updates.