The internet runs on TCP/IP, and in this episode we break down its fundamental layers and how they work together. We’ll explore the four-layer model—Application, Transport, Internet, and Network Access—and explain how each plays a role in getting data from one device to another.You’ll learn about IP addressing, ports, and packets, and see how TCP ensures reliable communication while UDP prioritizes speed. We’ll also connect these concepts to real-world networking scenarios, giving you the context you need for both the Network+ exam and practical troubleshooting.By the end of this episode, you’ll understand how TCP/IP serves as the backbone of modern networking and why it’s essential knowledge for every IT professional.

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