Although IP addressing is not especially complex, it is easier for users to work with host names rather than with the IPv4 or IPv6 addresses of hosts, such as websites, to which they want to connect.
When an application, such as Microsoft Edge, references a website name, the name in the URL is converted into the underlying IPv4 or IPv6 address using a process known as name resolution.
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The DNS server role is also used by computers to locate services within the network infrastructure.
For example, when a computer starts up, the user must sign-in to the Active Directory Domain Services (AD DS) domain and perhaps open Microsoft Office Outlook.
The TCP/IP protocol is an Active Directory operational requirement.
This means that all computers on a Windows 2000 network require a unique IP address to communicate with the Active Directory.
You can install the DNS server role by using Server Manager, or by using Windows Power Shell.