Episode 19 — Build a Mental Model of OSI and TCP IP Data Flow
Understanding how data flows through a network is a fundamental requirement of the GISF blueprint, and this episode focuses on building a clear mental model using the OSI and TCP/IP models. We deconstruct the seven layers of the OSI model—from the Physical layer to the Application layer—explaining the specific role and protocol found at each level. The discussion compares this to the four-layer TCP/IP model, clarifying how data is encapsulated as it moves down the stack and de-encapsulated as it moves up. You will learn about the critical functions of common protocols like IP, TCP, and UDP, and how they work together to ensure reliable delivery across a diverse network infrastructure. For a security professional, this model is essential for troubleshooting where a technical failure or a security breach has occurred in the communication chain. Mastering these layers provides the architectural foundation needed to design and secure modern, interconnected systems. 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.
