Fundamentals of Computer Networks and the Internet

Understanding how computer networks and the internet function is an essential foundation for computer science and IT literacy. This written course breaks down network infrastructure into clear, structured concepts that make technical topics easy to digest for complete beginners. You will explore core principles ranging from basic network topologies to global internet routing, giving you a clear picture of how data safely travels across local connections and the web. What you'll learn: Understand core networking terminology, hardware components, and network topologies; Examine the OSI model and TCP/IP protocol stack to see how data transfers layer by layer; Master IP addressing fundamentals, including IPv4, IPv6, and subnetting concepts; Analyze key internet services such as DNS, DHCP, HTTP, and HTTPS; Explore modern network security practices, encryption essentials, and basic firewall mechanics; Practice diagnosing common connectivity issues through guided written scenarios. The learning path begins with core terminology and foundational models before advancing into practical protocols and modern internet security standards. Designed for beginners, students studying basic informatics, and anyone seeking a solid grounding in networking concepts with no prior technical knowledge required. Start reading today to master the underlying structure of the modern internet.