Example 8: Classless Inter-Domain Routing (CIDR) (Super-netting)

Question:

IP: 172.16.225.10/18

Find Network ID?

Calculating Network Portion

Converting IP Address to Binary

                                                                   225 – 11100001

IP and Subnet Mask in Binary

Network ID Rule ->           Network – Constant

                                           Host       - Zero’s

Make Host as 0's

So Network ID 172.16.192.0