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Active Directory Partitions

Active Directory Partitions or Active Directory Naming Contexts: A partition is a data structure within AD used to distinguish data for different replication purposes. Active Directory divides information into multiple partitions. Each domain controllers have a copy of the NTDS.DIT database file which contains a minimum of three NCs.
Schema NC: Contains the rules and definitions that are used to creating and modifying object classes and attributes within Active Directory. Information of this partition replicates to every domain controller in a forest.
Configuration NC: Contains information regarding the physical topology of the network. As well as other configuration data that must be replicated throughout the forest. This information flows to every domain controller within a forest.
Domain NC: Domain NC consists of user, computer, and other resource information for a particular Active Directory Domain. Information of this partition replicates to every domain controller within the domain only.
Application NC: Application partitions provide fine control. It helps administrators direct where information is relocated to a domain or forest. It results in greater flexibility and better control over replication performance. For Example:
ForestDNSZone is part of a forest. All domain controllers and DNS servers in a Forest receive a replica of this partition.
DomainDNSZone: are unique for each domain. All domain controllers that are DNS server in that domain receive a replica of this partition.


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