Published video
Internet A-Z
DNS Explained
Most people describe DNS as “the Internet’s phonebook.” And that’s not wrong. But DNS does far more than just convert domain names into IP addresses. DNS decides: Which server you connect to Which location serves your request What happens if a server fails How performance and resilience are maintained In this episode of Internet A–Z, we go beyond the basic definition and understand DNS as the Internet’s control layer. You’ll learn: ✔ What DNS actually does ✔ The roles of Recursive, Root, TLD, and Authoritative servers ✔ How the 13 logical root servers work ✔ What Anycast means (at a conceptual level) ✔ How TTL and caching improve performance ✔ Why “DNS propagation” is really cache expiry ✔ How DNS works with CDNs to improve resilience If you want to truly understand how the Internet works — not just use it — this episode builds that foundation. Next episode: TCP vs UDP — Reliable vs Fast communication. Happy Networking.