What's the maximum number of IP addresses that can be assigned with a local subnet mask of 255.255.255.224? - Quora
Subnetting Worked Examples and Exercises
Firewall — Methods of Using Additional Public IP Addresses | pfSense Documentation
What is subnet mask should I use? If I currently use the default mask for myIP 192.168.1.0 I need to subnet my network so that I have 30 additional networks, and 4
CIDR, Subnet Masks, and Usable IP Addresses : Quick Reference Guide
Network Subnets (CIDR) and Usable IP Addresses Reference Guide | Blog | deeserve