Subnetting

Subnetting :

Scenario:
Given IP 192.168.2.0
Default subnet Mask class c is 255.255.255.0

The above IP subnet mask allows only one network

you need more than that ,lets say 30

so try the subnet mask 255.255.255.248

or in Binary
11111111 11111111 11111111 11111000


5 1's in left most so it is 2*5 32 Networks.
3 zeros so 8 hosts or 6 to be accurate per network
2*3=8 ,but since last and first host all Zero's and
all 1's cannot be used ,we get 6 use able hosts
per Network.

so subnetting or VLSM is varying the subnet mask
to have the number of networks and hosts that
is required.

Supernetting is increasing the number of
hosts by reducing the number of Binary 1's

Now in a real Network where do we assign the
IP's , either it is on a Computer or a Router.

Next we find out the IP range of all the
subdivided Networks.