CDNs Explained in 6 Minutes | System Design Basics

Your server is in Virginia. Your user is in Tokyo. That's 11,000 kilometers of latency you can't code your way out of — but you CAN move the data closer. This video breaks down how Content Delivery Networks work: edge servers, cache hits vs misses, Cache-Control headers (public, private, max-age, no-store), and the trade-offs every developer should understand before deploying to production. What you'll learn: - What is CDN - What content belongs on a CDN (and what doesn't) - Cache-Control header - Content-hashed filenames for cache busting - Origin offloading and DDoS protection benefits - Cost and personalization trade-offs Timestamps: 0:00 - Intro 0:32 - The Core Concept 1:18 - What belongs to CDN 2:07 - Cache control headers 3:07 - Benefits 4:05 - TradeOffs 5:24 - The Mental model More Videos : Software Egineering Basics - https://www.youtube.com/playlist?list=PLWP-VtjCVpWyLNBm3zz_sGyC5mVwiAOvj Software Design - https://www.youtube.com/playlist?list=PLWP-VtjCVpWx7kPq30XRN6O6LjVQ4VL95 Whether you're preparing for system design interviews or optimizing your web app's performance, understanding CDNs is non-negotiable. #cdn #systemdesign #webdev #caching #backend #softwareengineering