The Sky Networks - CIDR CIDR (Classless Inter-Domain Routing) notation rather than the common subnet mask 255.x.x.x when configuring addresses and networks. Refer to the CIDR Subnet Table to find the CIDR
If the range of IP 172.16.0.0/12 is class B , why can I use the subnet mask 255.255.255.0 in this range? - Quora
How to find the maximum and minimum IP addresses connected to a network if, for example, the given IP address is 201.23.14.0/30 - Quora
![IP Addressing: IPv4 Addressing Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903) - Configuring IPv4 Addresses [Support] - Cisco IP Addressing: IPv4 Addressing Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903) - Configuring IPv4 Addresses [Support] - Cisco](https://www.cisco.com/c/dam/en/us/td/i/100001-200000/180001-190000/186001-187000/186267.eps/_jcr_content/renditions/186267.jpg)