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CCNA Exam Prep 6, IPv4 Subnetting Without a Calculator

CCNA Exam Prep 6, IPv4 Subnetting Without a Calculator

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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
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