...It structures networking fundamentals from basic IP addressing and subnetting all the way through modern container and cloud networking topics like Docker and Kubernetes, making it valuable for learners at different stages of their DevOps journey. The guide breaks topics down into clear, digestible markdown files that include simple definitions, common use cases, and essential command-line examples, which makes the material approachable even if you are just starting out. It covers the full stack of networking concerns, such as DNS, HTTP/S protocols, load balancing, firewalls, VPNs, proxies, CDNs, and more, all with a practical orientation toward how these systems operate in real infrastructure.