🌐DNS

A complete, self-contained learning track. No prior networking or DNS theory assumed — only that you have used Linux and typed a hostname into a browser.

Nine modules take you from "what is a name" to running a signed authoritative zone and debugging a five-second timeout inside Kubernetes. Every concept is taught before it is used, so the modules are meant to be read in order.

🧠 concept → 🧪 exercise → ✅ expected result (hidden) → 🎯 interview questions (answers hidden)