Let's see if I understand subnetting correctly.
If I want to split a class C network to setup a firewall I would
take the existing network, say a.b.c.0 with a netmask of
255.255.255.0 and instead I would end up with 2 usable networks
if I use a netmask of 255.255.255.192. I would end up with
network a.b.c.64 with a netmask of 255.255.255.192 and network
a.b.c.128 with a netmask of 255.255.255.192. Therefore, I would
have available addresses of a.b.c.65 (netmask 255.255.255.192)
through a.b.c.126, broadcast address would be a.b.c.127 and
a.b.c.129 (netmask 255.255.255.192) through a.b.c.191, broadcast
address would be a.b.c.192.
I can't use a.b.c.0 through a.b.c.63 and a.b.c.193 through
a.b.c.255.
Does this sound right?
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