Suppose you have leased two Class C licenses 115100100 and 1

Suppose you have leased two Class C licenses. 115.100.10.0 and 115.100.11.0. You want to use all these Class C IP addresses in one supernet. What is the CIDR notation for this supernet? What is its supernet mask?

Solution

the binary notation of given ip is

115.100.10.0 - > 011100111 . 01100100 . 00001010. 00000000

115.100.11.0 -> 011100111 . 01100100 . 00001011 . 00000000

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clearly, in given two ip first 23 bits are fixed i.e. 011100111 . 01100100 . 0000101.

so the CIDR notation for the supernet for this two ip range is : 115.100.10/23

and by making all fixed bit to 1 . the supernet mask is -> 255.255.254.0.