netmasks(4)               FILE FORMATS                netmasks(4)



NAME
     netmasks - network mask data base

DESCRIPTION
     The netmasks file contains network masks used  to  implement
     IP standard subnetting.  For each network that is subnetted,
     a single line should exist in this  file  with  the  network
     number,  any number of SPACE or TAB characters, and the net-
     work mask to use on that network.  Network numbers and masks
     may  be specified in the conventional IP `.'  notation (like
     IP host addresses, but with zeroes for the host  part).  For
     example,

          128.32.0.0 255.255.255.0

     can be used to specify that the Class B  network  128.32.0.0
     should  have  eight  bits  of subnet field and eight bits of
     host field, in addition to the standard sixteen bits in  the
     network field.

FILES
     /etc/netmasks

SEE ALSO
     ifconfig(1M)

     Postel, Jon, and Mogul, Jeff, Internet  Standard  Subnetting
     Procedure, RFC 950, Network Information Center, SRI Interna-
     tional, Menlo Park, Calif., August 1985.


























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