Consultant
Wed Sep 01 08:47:33 CDT 2004
i say forget subnetting altogether and just play doom!
"Cory Dunkle" <cdnews@comcast.net> wrote in message
news:i8qdnR5dbarzr6jcRVn-tg@comcast.com...
> "Andy Foster" <andy.remove@andyfoster.this.com> wrote in message
> news:2pkme2Fjoog1U1@uni-berlin.de...
> > "Cory Dunkle" <cdnews@comcast.net> wrote in message
> > news:yKednev4wacZg6jcRVn-uA@comcast.com...
> > > Trying to get back on the ball towards my certification... Thanks for
> any
> > > help you guys can offer.
> > >
> > > Why can a DHCP scope with a starting address of 172.41.48.1 not have a
> 19
> > > bit subnet mask?
> > >
> >
> > 172.41.48.1 /19 would be in the subnet 172.41.32.1 - 172.41.63.255 half
of
> > which isn't yours.
> > /19 gives you 19 bits for the network, 13 bits for hosts, giving network
> > increments of 32.0 (2^5 * 2^8)
> > e.g. 172.41.0.0, 172.41.32.0, 172.41.64.0, 172.41.96.0, etc.
> > You need at least /20 (20 bits for the network, 12 bits for the
> host)giving
> > network increments of 16.0 (2^4 * 2^8)
> >
> > If this is as clear as mud, try learntosubnet.com
>
> Thanks Andy. I can't believe I didn't see that myself. I must be getting
too
> tired... I think I'm gonna play some Doom 3 and go to sleep!
>
> Cory
>
>