Step by Step Guide to Understanding IP Subnetting - Expert Network Consultant
Subnetting Example with a /16 prefix » NetworkUstad
ip - How do you calculate the prefix, network, subnet, and host numbers? - Network Engineering Stack Exchange
Consider that the IP address is 192.248.87.3 and the sub-net mask is 255.255.255.224. How many hosts can be directly connected to this network? - Quora
Prefix, network, broadcast and host address » NetworkUstad
Subnetwork - Wikipedia
Subnet Mask Cheat Sheet - A Tutorial and Thorough Guide to Subnetting!