How 3 hours with no DNS caused a day of outage

In this clip, Hussein Nasser dissects the infamous Amazon us-east-1 DNS blackout that morphed a brief three-hour glitch into a full day of downtime—highlighting where the chain of failures began and how it spiraled out of control.

Along the way he sprinkles links to his full video and a library of beefy backend-engineering courses (OS fundamentals, Node internals, networking, databases, NGINX, Python, you name it), plus invites you to join his YouTube membership, follow him on Medium, grab Udemy coupon codes, or even buy him a coffee if you’re feeling generous.

Watch on YouTube