I am given a list of IPs, some of them have a netmask, other no. I got the idea of how to create a mask but i'm not understanding why there are cases where an IP doesn't have a mask.
Like the following:
- 18.104.22.168–22.214.171.124 > Don't have mask
- 126.96.36.199–188.8.131.52 > Don't have mask
- 184.108.40.206–220.127.116.11 > Don't have mask
While the following actually have mask address:
- 18.104.22.168-22.214.171.124 > Prefix notation: 126.96.36.199/28 | Address/Mask: 188.8.131.52/255.255.255.240 and so on.
For example if I look at the third one of the addresses without mask i do the following:
93.20. 0000 101|0 . 0000 0000
93.20. 0000 101|1 . 0000 0000
NetMask: 255.255.254.0, that is not correct.
Can somebody explain me why and how to understand when a mask exists?