CCNA Exam Prep 53, Layer 2 Security — Port Security

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: - How port security restricts port access by limiting the number and identity of allowed MAC addresses. - The function of sticky MAC learning, which dynamically learns addresses and saves them to the running configuration. - The three violation modes: protect (silent drop), restrict (drop and alert), and shutdown (disable the port). - How to use the 'show port-security interface' command to verify status and troubleshoot violations. - The manual ('shutdown'/'no shutdown') and automatic ('errdisable recovery') methods to restore a port from an err-disabled state. 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