The GLobal Catalogue has a reference to all objects within Active Directory. Its is know as GC
The schema is the Active Directory component that defines all the objects and attributes that the directory service uses to store data.
The DS tools consist of the following commands DSQUERY - search for active directory objects matching criteria DSGET - retrieves selected attributes from active directory objects DSMOD - modify attributes for one or more active directory objects DSADD - create active directory objects DSMOVE - move active directory objects DSRM - removes/deletes active directory objects
Active Directory data is logically partitioned so that each domain controller does not store all objects in the directory. Each directory partition, also called a naming context, contains objects of a particular scope and purpose. Below are the three major Active Directory partitions described:-· Schema Partition defines the object classes and their attributes for the entire directory. The configuration is replicated to everydomain controller in the forest.· Domain Partition contains all the objects stored in a domain, including users, groups, computers, and group policy containers (GPCs). This partition information is replicated to all domain controllers within a domain, but not to domain controllers in other domains.· Configuration Partition contains objects that represent the logical struct-er of the forest, domains, as well as the physical topology, including sites, subnets, and services.Application Directory Partition replicates directory partition only to specific domain controllers. This is responsible for generating and maintaining Replication topology. Objects stored in Application directory partition are not replicated to the Global Catalog.
user
The Active Directory Schema defines the types of user,printer objects to be created in the domain
LDAP
Domain
The Coriolis component of acceleration is present in rotating reference frames, such as the Earth's surface. It causes objects to veer to the right in the northern hemisphere and to the left in the southern hemisphere, as a result of the Earth's rotation. It is an inertial force that arises due to the motion of an object within the rotating frame of reference.
Contains a < domain > container (for example, the abc.com container), which stores users, computers, groups, and other objects for a specific Windows domain (for example, the abc.com domain). Updates to the < domain > container are replicated to only domain controllers within the domain and to Global Catalog servers if the update is made to an attribute that is marked for replication to the Global Catalog. The < domain > container is displayed in the Active Directory Users and Computers console. The hierarchy of domain directory partitions can be viewed in the Active Directory Domains and Trusts console, where trust relationships between domains can be managed.
Domain
lingering object
The Active Directory schema defines the kinds of objects, the types of information about those objects, and the default security configuration for those objects that can be stored in Active Directory. The Active Directory schema contains the formal definitions of all objects, such as users, computers, and printers that are stored in Active Directory. On domain controllers running either Windows 2000 or Windows Server 2003, there is only one schema for an entire forest. This way, all objects that are created in Active Directory conform to the same rules. The schema has two types of definitions: object classes and attributes. Object classes such as user, computer, and printer describe the possible directory objects that you can create. Each object class is a collection of attributes. Attributes are defined separately from object classes. Each attribute is defined only once and can be used in multiple object classes. For example, the Description attribute is used in many object classes, but is defined only once in the schema to ensure consistency.