CCNA Exam Prep 13, Switching Concepts — MAC Learning and Flooding

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: - A switch learns MAC addresses by examining the source address of an incoming frame and adding it to its CAM table. - Forwarding and filtering decisions are always based on the destination MAC address in the frame header. - An 'unknown unicast' frame, where the destination is not in the CAM table, is flooded out all ports except the one it was received on. - Dynamically learned MAC address entries are removed from the table after a default aging timer of 300 seconds of inactivity. - Broadcast frames (destination FFFF.FFFF.FFFF) are always flooded, which is different from the conditional flooding of unknown unicast frames. 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