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
> > >
> > > -
> > > To unsubscribe from this list: send the line "unsubscribe linux-net" in
> > > the body of a message to [EMAIL PROTECTED]
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-net" in
> > the body of a message to [EMAIL PROTECTED]
> >
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-net" in
> the body of a message to [EMAIL PROTECTED]
>
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to [EMAIL PROTECTED]
