# symbolic names for networks, see networks(5) for more informationlink-local 169.254.0.0
default 0.0.0.0loopback 127.0.0.0link-local 169.254.0.0
localnet 192.168.1.0
default 0.0.0.0loopback 127.0.0.0localnet 192.168.1.0
It is normal for there to be no /etc/networks file; it is entirely optional, andits use is rare in practice. It's historic, and doesn't even support modern(variable-length) address masks.
Here is an example of ane /etc/networks file where the local network is192.168.1. and all the hosts are on that subnet. (This the linksysrouter default)loopback 127.0.0.0homenet 192.168.1.0