Introduction to Subnetting - How to Calculate Subnets, CIDR, VLSM!
Online Subnet Calculator - YouTube
Subnetting - Calculate Subnet Masks & More | Pluralsight
IP Routing on Subnets
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