Name server
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A name server is a computer server that implements a name service protocol. It will normally map a computer usable identifier of a system or host to a human usable identifier for that host, and vice versa. For example, a Domain Name System (DNS) server might translate the domain name en.wikipedia.org to the Internet Protocol address 145.97.39.135.
DNS is the protocol implemented by internet name servers. Name servers also exist on some Windows networks where one system can take the role of Browser Master and act as a NetBIOS name server. In small peer-to-peer networks of Windows systems there is no single name server and name resolution is performed using broadcasts.