Computer Networks and Internet Fundamentals

Understanding how data moves across computer networks and the internet is an essential skill for IT specialists, system administrators, and software developers. This text-based course guides you through the fundamental building blocks of modern networking, starting from core terminology and standard reference models to practical protocol principles. You will gain a clear conceptual understanding of how network devices communicate and how to structure secure, reliable network environments. What you'll learn: - Understand key networking terms, network topologies, and the OSI and TCP/IP reference models. - Analyze standard application and transport protocols including HTTP, HTTPS, DNS, DHCP, and TCP/UDP. - Practice IP addressing concepts and subnetting across both IPv4 and IPv6 networks. - Explore foundational routing and switching mechanics for efficient data transmission. - Apply essential network security principles, including basic firewall rules and zero-trust concepts. - Learn standard diagnostic methodologies to troubleshoot connectivity issues. The course starts with key terminology, network layers, and foundational definitions before progressing into protocol specifications and security practices. Designed specifically for beginners, this course requires no prior background in networking. Start reading today to master the fundamentals of computer networks and the internet.