Hi, On Fri, Oct 17, 2008 at 13:18, John <jses27 at gmail.com> wrote: > To early in the day for all this math. It really is! :-) > Your right saying x.31 - x.63 for > that particular SN, with x.63 being the broadcast addy and x.31 the network > addy. Actually, x.32 to x.63, with x.32 being the network address. My personal opinion, if you're using RFC1918 addresses for internal networks, you should only use 255.255.255.0 netmasks everywhere, even though it's a network for one machine only. Dealing with netmasks is a PITA, and should be avoided unless there's a real reason to use it, for instance with valid IPs. Filipe