This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- To calculate a subnet's block size instantly using the '256 minus the mask's interesting octet' trick.

- To identify an IP address's network and broadcast addresses using the calculated block size.

- The difference between total IP addresses in a subnet (2^h) and usable host addresses (2^h - 2), a common exam trap.

- How to quickly convert between subnet mask decimal notation (e.g., 255.255.255.224) and CIDR slash notation (e.g., /27).

- To apply the 'Block Size is Boss' mental shortcut to anchor your subnetting calculations under exam pressure.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep