Episode 21: IPv4 Subnetting — The Process Step by Step
In this episode, we walk through the full process of subnetting an IPv4 network, step by step. You’ll learn how to take a larger network and divide it into smaller subnets using a combination of binary math, subnet masks, and CIDR notation. We explain how to calculate the number of usable hosts, identify valid subnets, and determine the network and broadcast addresses. Each concept is presented with clear examples that you can follow along with, whether you're listening or taking notes.
We also offer tips for solving subnetting questions quickly and efficiently on the exam, including how to recognize powers of two and how to use mental shortcuts. Subnetting may seem intimidating at first, but by the end of this episode, you’ll have a repeatable method you can apply with confidence. Whether you’re building out multiple VLANs or just need to assign IPs cleanly, mastering subnetting is a must-have skill for every network professional.
