DNS in an Active Directory Domain Services Environment

DNS is inseparable from Active Directory. In fact, the two are often confused for one another because of the similarities in their logical structures.

Active Directory uses a hierarchical X.500-based structure that was designed to map into the DNS hierarchy, hence the similarities. In addition, Active Directory utilizes DNS for all internal lookups, from client logons to Global Catalog lookups. Subsequently, strong consideration into how DNS integrates with Active Directory is required for those considering deploying or upgrading AD.

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