Microsoft has included a Domain Name System (DNS) Server service in versions of Windows Server since Windows NT 4.0. DNS is a hierarchical, distributed database that contains mappings of DNS domain names to various types of data, such as IP addresses. With Windows Server 2008, the DNS Server service includes new background zone loading, enhancements to support IPv6, support for read-only domain controllers (RODCs), and the ability to host global single-label names.
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