Example 6: Classless Inter-Domain Routing (CIDR) (Super-netting)

Question:

IP                           : 172.16.1.126

Subnet Mask         : 255.255.255.128

Find the Network ID?

Answer:

Converting IP Address to Binary

Converting IP Address to Binary

                                           

126 – 11111110                                                    128 – 01000000

IP and Subnet Mask in Binary

Network ID Rule ->           Network – Constant

                                           Host       - Zero’s

Make Host as 0's

So Network ID is 172.16.1.0