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ARPA Host Name Server Protocol

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The ARPA Host Name Server Protocol (NAMESERVER), is an obsolete network protocol used used in translating a host name to an Internet address. IANA allocated udp and tcp port 42 for NAMESERVER; this port is more commonly used by the Windows Internet Name Service (WINS) on Microsoft operating systems.

Support

The NAMESERVER protocol is used by the DARPA Trivial Name Server, a server process called tnamed that is still provided in some implementations of UNIX.

Replacement

Support for the NAMESERVER protocol has been deprecated, and may not be available in the latest implementations of all UNIX operating systems. The Domain Name System (DNS) has replaced the ARPA Host Name Server Protocol and the DARPA Trivial Name Server.

See also

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