Certified: SANS GIAC GSEC Audio Course

Every cybersecurity role depends on understanding how data moves, and this episode makes the OSI and TCP/IP models come alive. You’ll hear how each layer—from physical signals to application data—adds structure, context, and control. We discuss how encapsulation works, why headers matter, and where vulnerabilities typically appear as traffic ascends or descends these layers. Knowing which layer a problem belongs to is key not only for the exam but for troubleshooting in real networks, where symptoms at one layer often originate at another.

The episode then connects theory to practice, showing how protocols like TCP, UDP, and ICMP map into these layers and what security implications come with each. You’ll learn how packet capture tools visualize this layering and how analysts use it to identify anomalies, such as mismatched handshakes or suspicious payloads. By grounding the abstract OSI stack in concrete examples, this discussion builds the mental map you’ll rely on for everything from firewall tuning to intrusion analysis. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.