split/isolate network

[Steven Susbauer]

On 11/20/2010 02:24 PM, rikona wrote:
> This is starting to sink in. I sort of understood it before, but not
> well. If I'm understanding it right, would this require a mask
> different from 255.255.255.0 to work correctly[ so the 3rd byte keeps
> them separate]?

No. The mask as it is reserves the first three octets for the network 
address and the last for hosts. Therefore 192.168.1.0 and 192.168.2.0 
are two different networks and you only need 255.255.255.0 as the subnet 
mask.

The only real reason you would change it is if you wanted to split apart 
a 192.168.1.0 network into subnets, for example the 255.255.255.128 mask 
splits it into half. One at 192.168.1.0 and the other at 192.168.1.128. 
At that point a host at 192.168.1.1 could not speak to 192.168.1.129 
without a router, just like using the two class C networks above.