ARPA Host Name Server Protocol

The ARPA Host Name Server Protocol (NAMESERVER^[1]), is an obsolete network protocol used in translating a host name to an Internet address. IANA Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port 42 for NAMESERVER; this port is more commonly used by the Windows Internet Name Service (WINS) on Microsoft operating systems.

Application

The NAMESERVER protocol is used by the DARPA Trivial Name Server, a server process called tnamed that is provided in some implementations of UNIX^[2][3][4].

Replacement

Support for the NAMESERVER protocol has been deprecated, and may not be available in the latest implementations of all UNIX operating systems^[5]. The Domain Name System (DNS) has replaced the ARPA Host Name Server Protocol and the DARPA Trivial Name Server.

See also

• List of TCP and UDP port numbers
• List of Unix operating systems
• Domain Name System

References

1. ^ OFFICIAL INTERNET PROTOCOLS (see "IEN 116" at top of page 31)
2. ^ DARPA Trivial Name Server NeXT NEXTSTEP documentation
3. ^ DARPA Trivial Name Server Sun Solaris documentation
4. ^ Trivial Name Server SCO UnixWare documentation
5. ^ Somewhat incomplete list of UNIX operating systems that either support or do not support the DARPA Trivial Name Server (tnetd)

External links

• IEN 116 Internet Name Server
• Development of the domain name system

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