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@(#)networks.5 8.1 (Berkeley) 6/5/93
.Dd June 5, 1993 .Dt NETWORKS 5 .Os BSD 4.2 .Sh NAME .Nm networks .Nd network name data base .Sh DESCRIPTION The .Nm file is used to translate between Internet Protocol
q Tn IP network addresses and network names (and vice versa) when .Xr named 8 is either not running (e.g. at boot time), or not configured.
p While the .Nm file was originally intended to be an exhaustive list of all .Tn IP networks that the local host could communicate with, distribution and update of such a list for the world-wide .Tn Internet (or, indeed, for any large "enterprise" network) has proven to be prohibitive, so the Domain Name System
q Tn DNS is used instead, except as noted.
p For each .Tn IP network a single line should be present with the following information: d -unfilled -offset indent official network name ip network number aliases .Ed
p Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of the line are not interpreted by routines which search the file.
p Network number may be specified in the conventional ``.'' (dot) notation using the .Xr inet_network 3 routine from the .Tn IP address manipulation library, .Xr inet 3 . Network names may contain .Qq a through .Qq z , zero through nine, and dash. .Sh FILES l -tag -width /etc/networks -compact t Pa /etc/networks The .Nm file resides in
a /etc . .El .Sh SEE ALSO .Xr getnetent 3 , .Xr resolv.conf 5 , .Xr hostname 7 , .Xr named 8 , .Rs .%R RFC .%N 2317 .%D March 1998 .%T "Classless IN-ADDR.ARPA delegation" .Re .Rs .%R RFC .%N 1918 .%D February 1996 .%T "Address Allocation for Private Internets" .Re .Rs .%R RFC .%N 1627 .%D July 1994 .%T "Network 10 Considered Harmful" .Re .Rs .%R RFC .%N 1519 .%D September 1993 .%T "Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy" .Re .Rs .%R RFC .%N 1101 .%D April 1989 .%T "DNS Encoding of Network Names and Other Types" .Re .Sh HISTORY The .Nm file format appeared in x 4.2 .