Which of the following address ranges is not listed in RFC 1

Which of the following address ranges is not listed in RFC 1918?

A. 10.0.0.0 to 10.255.255.255

B. 172.16.0.0 to 172.31.255.255

C. 172.16.0.0 to 172.63.255.255

D. 192.168.0.0 to 192.168.255.255

Solution

Ans) C

Reason:

In RFC 1918

24 bit bloc ranges from 10.0.0.0 to 10.255.255.255

20 bit block ranges from 172.16.0.0 to 172.31.255.255

16 bit block ranges from 192.168.0.0 to 192.168.255.255

among the options 172.16.0.0 to 172.63.255.255 range is invalid.