Windows Security
Windows server operating systems provide a full range of security features that make for very secure network operating systems. Windows Server 2003 is considered more secure than Windows 2000, as it employs a "secure by default" strategy through which unnecessary applications, services, and security configurations are disabled by default. Administrators can then enable applications and services on an as needed basis.
Authentication security is provided on Windows servers through Kerberos version 5. File system security and encryption are provided through NTFS permissions and EFS. Network communication can be protected by a range of security and authentication protocols, though IPSec is most commonly used on Windows server networks to provide both encryption and authentication for network data.