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