Integrating DNS with Active Directory Domain Services provides automatic replication between domain controllers in a common ...

Integrating DNS with Active Directory Domain Services provides automatic replication between domain controllers in a common domain or forest. By installing multiple domain controllers in a domain running DNS Server, you can ensure that DNS will continue to work when a domain controller fails. Having multiple domain controllers can also give you the ability to locate the servers in sites where they can be reached most efficiently by DNS clients. In addition, the resulting load balancing can improve overall DNS performance.