/etc/netmasks contains network masks used for
IP subnetting. Each line in this file contains a
network number and a
network mask for use on the
network.
This file is the source for the netmasks.byaddr map for those who are using NIS.
An example:
#
# netmasks
#
149.43.0.0 255.255.255.0
149.42.0.0 255.255.255.128