History of Microsoft DNS

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History of Microsoft DNS

DNS was first introduced in the Microsoft environment as part of the Resource Kit for NT Server 3.51. It was not available as part of the NT source files. With version 4.0, DNS is now integrated with the NT source files. Although DNS is not installed by default as part of an NT 4.0 Server installation, you can specify DNS be included as part of an NT installation or you can add DNS later just as you would any other networking service that is part of NT.

Microsoft DNS is based on RFCs 974, 1034, and 1035. A popular implementation of DNS is called BIND (Berkeley Internet Name Domain), developed at UC Berkeley for their version of Unix. However BIND is not totally compliant with the DNS RFCs. Microsoft’s DNS does support some features of BIND, but Microsoft DNS is based on the RFCs, not on BIND.

You can read these RFCs, or any other RFC, by going to the InterNIC Web site at http://ds.internic.net/ds/rfc-index.html.

Microsoft is planning major enhancements to DNS for NT 5.0. Microsoft is planning to introduce an X.500-type directory structure for their networks in version 5.0. This directory structure will use DNS as the means to organize and control the network architecture. In current versions of NT, the only way to link domains together is through trust relationships. However, even though the domains are linked, you cannot easily manage all the domains. In NT 5.0, Microsoft is planning to keep trusts but manage them through DNS. In DNS an administrator will be able to see all the servers in the network in a hierarchy that brings all the resources in the network together in a more logical manner than the current interface for trust relationships provides.

Microsoft is planning a migration path to move existing trust relationships into DNS. Although administrators have been using DNS mostly to manage Internet or intranet connections, in the future administrators will use DNS to manage their entire network, both for local access and for Internet access.

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