On Wed, 28 Jul 2004 12:21:26 -0400, John Nichel <john@xxxxxxxxxxxx> wrote:
Hi,
My binary skills are lacking, so does anyone know of a tool (online or otherwise) to convert CDIR notation into the physical IP range? eg convert 192.168.0.0/24 into 192.168.0.0 through 192.168.0.255 (so I can see what the actual range is). TIA
Let me see if I can help, and if someone else already has, so be it.
CIDR notation simple expresses the subnet mask a different way. An easy way to convert is to take the CIDR number and place that many 1's in the subnet mask. Per your example of 192.168.0.0/24 :
11111111 11111111 11111111 00000000 or 255.255.255.0 for a subnet mask.
This means that the first three octets (sets of eight bits) will be the same on all nodes of the network. This is the Network Address. The last octet of the mask, being zero, means that the number represented there is the machine address.
Remember that octets range from 0 to 255, giving you a total of 256 Machine Addresses per Network Address. Remember also that .0 is the address of the network and .255 is the broadcast address for the whole subnet, so you actually have 254 usable addresses.
Clear as mud ???
Joebewan
