Tham khảo tài liệu 'windows server 2008 inside out- p22', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Design Considerations for Compatibility 1017 Understanding Domain Functional Level When you set a functional level for a domain the level of functionality applies only to that domain. This means that other domains in the forest can have a different functional level. As shown in Table 30-1 there are several domain functional levels. Changing a functional level changes the operating systems that are supported for domain controllers. For example in Windows 2000 native functional level the domain can have domain controllers running Microsoft Windows 2000 Server Microsoft Windows Server 2003 or Windows Server 2008. Note You cannot use the Windows 2000 mixed domain functional level with Windows Server 2008 domain controllers. If your domain is operating at this level and you want to install a domain controller running Windows Server 2008 you ll first need to raise the domain functional level to Windows 2000 native or higher. Although you can raise the domain functional level you can never lower it. This means that if you raise the domain functional level to Windows Server 2008 you can configure only Windows Server 2008 domain controllers in the domain. Table 30-1 Domain Functional Levels Domain Functional Level Supported Domain Controllers Windows 2000 mixed Windows Server 2003 Windows 2000 Server Windows NT backup domain controller BDC Windows 2000 native Windows Server 2008 Windows Server 2003 Windows 2000 Server Windows Server 2003 Windows Server 2008 Windows Server 2003 Windows Server 2008 Windows Server 2008 Domains operating in Windows 2000 native mode can use group nesting group type conversion universal groups and migration of security principals. Domains operating in this mode aren t able to use easy domain controller renaming update logon time stamps or Kerberos key distribution center KDC key version numbers. Domains in Windows Server 2003 mode can use many improved Active Directory features including group nesting group type conversion universal groups .
