IIRC, RFC 1812 states that it's perfectly OK to use the first and last
numbers of a given range of IPs. There's never been a problem with using
your network address, and as long as you configure your system to use a
different broadcast address, there shouldn't be a problem using that
either. You might run into a problem if you have an old router or
something tho...
---
[EMAIL PROTECTED]
On Sat, 6 Feb 1999, Brendan Kosowski wrote:
>
> This is my theory :
>
> First of all, they don't use classes anymore ( that was in the olden days
> when there was lots of ip address space ). IP addresses are now CLASSLES
> and this is why we see the /x number on the end. I will give you an
> example of my network :
>
> My IP ADDRESSES are 203.37.170.240/29
>
> This is what you do :
>
> SUBTRACT 29 FROM 32. ANSWER = 3
>
> then do 2 TO THE POWER OF 3. ANSWER = 8
>
> This means my ISP has allocated me 8 ip addresses starting at
> 203.37.170.240 and ending at 203.37.170.247
>
> The First number should not be used because that is your NETWORK ADDRESS.
> and
> The Last number should not be used because that is your BROADCAST ADDRESS.
>
> That means I am left with only 6 IP addresses for my hosts.
>
> Your NETMASK is made up of 29 1's and 3 0's eg:
>
> in binary that is 11111111.11111111.11111111.11111000
>
> in decimal that is 255.255.255.248
>
>
> HOPE THAT HELPS.
>
> Regards, Brendan...
>
> --------------
> Alexander Feldman is CORRECT.
> On Sat, 6 Feb 1999, Warren Mira wrote:
>
> >
> >
> > On Sun, 31 Jan 1999, Alexander Feldman wrote:
> >
> > > This is the number of 1's in the binary representatin of the netmask.
> > > For example /24 is equal to 255.255.255.0 or
> > > 1111111111111111111111111111111100000000.
> >
> > I dont think so...../x or /24.../27 .../8...etc..is the number of network
> > bits from left to right...
> >
> > for classful ip's.....
> >
> > Class A:
> >
> > nnnnnnnn.hhhhhhhh.hhhhhhhh.hhhhhhhh so we have /8
> >
> > class B:
> > nnnnnnnn.nnnnnnnn.hhhhhhhh.hhhhhhhh so we have /16
> >
> > class C:
> >
> > nnnnnnnn.nnnnnnnn.nnnnnnnn.hhhhhhhh so we have /24
> >
> > if a class C were to have 8 subnets....we have to take 3 bits to the host
> > field..so it becomes...
> >
> > nnnnnnnn.nnnnnnnn.nnnnnnnn.nnnhhhhh so we have /27
> >
> > chow :)
> > >
> > > Rgds: Alexander Feldman
> > >
> > > Bruno Randolf wrote:
> > > >
> > > > could anyone explain to me what the /x notation (for example /24) means
> > > > when used with ip address spaces?
> > > > or point me to some good ressources, please.
> > > >
> > > > thanks,
> > > > Br1
> > > >
> > > > -
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