Introduction to Computer Networks and Internet Architecture

Every digital connection we make relies on a structured web of protocols and hardware. Understanding how data travels across the globe is the first step toward a career in IT, systems administration, or cloud engineering. This text-based course guides you from the absolute basics of networking terminology to designing functional network architectures. You will gain the confidence to analyze network traffic, understand how the modern internet operates, and apply foundational concepts to real-world scenarios. What you'll learn: - Understand foundational networking terminology, historical evolution, and core architectural components. - Compare and contrast the layers of the OSI and TCP/IP reference models. - Analyze essential protocols including IP, TCP, UDP, DNS, and HTTP. - Identify the roles of common network devices like routers, switches, and firewalls. - Apply modern IP addressing schemes, including IPv4 subnetting and IPv6 transitions. - Explore contemporary security concepts, including zero-trust principles and basic network defense. The journey begins with foundational definitions and historical context before moving systematically through the layers of network architecture, protocol analysis, and practical design scenarios. You will progress through written explanations, architectural breakdowns, and self-paced troubleshooting exercises. Designed entirely for beginners, this course requires no prior technical background or networking experience. Start reading today to demystify the infrastructure that powers our digital world.