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The Function of DNS

The function of DNS is name resolution. When a user tries to access another computer on a network, regardless of the size of the network, an architecture must be in place to map names to addresses. Many name resolution methodologies exist on a Windows 2000 computer, but the default host name resolution methodology is DNS. In this chapter, we discuss DNS as it relates to the Active Directory. DNS is the only name resolution tool that works with the Active Directory. An AD without a properly configured DNS is a standalone AD. You can install the AD on a Windows 2000 server without configuring DNS, but the AD will be almost completely nonfunctional.

Name resolution is the process of mapping a name to an address. This actually happens at several layers of the Open Systems Interconnect (OSI) model.

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