Native mode domain A domain where all domain controllers are running Windows 2000. For native mode, member servers and client computers do not need to run Windows 2000. The definition of a type of object that can reside in the Active Directory. Objects Actual instances of an object class. Every object must be identified by a unique name.
Operations master A domain controller with a given administrative function.
Every Active Directory forest must have masters for schema, domain naming, RID, NT primary domain controller emulation, and infrastructure. A container object used to organize a domain into logical administrative groups. OUs can contain other objects, such as user accounts, groups and computer accounts, and they can also contain other OUs. OUs are normally hierarchical, based on the company s specific administrative model. They can be based on function, geography, or any other model.