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Active Directory Replication

Posted by Ravi shankar on February 24, 2009

In Active Directory, replication ensures that any changes made to a domain controller within a domain are replicated to all the other domain controllers in the domain. Active Directory utilizes multimaster replication to replicate changes in the Active Directory data store to the domain controllers. With multimaster replication, domains are considered peers to one another. With Windows Server 2003, the Knowledge Consistency Checker (KCC) is used to create a replication topology of the forest, to ensure that the changes are replicated efficiently to the domain controllers. A replication topology reflects the physical connections utilized by domain controllers to replicate the Active Directory directory to domain controllers in a site, or in different sites. Intra-site replication occurs when the Active Directory directory is replicated within a site. When replication occurs between sites, it is known inter-site replication. Since the bandwidth between sites are typically slow, information on site link objects is utilized to identify the most favourable link that should be used for moving replication data between sites in Active Directory.


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