🌍 CDN Explained Like You're 5
Building AI systems and writing about how they actually work. Master of AI @ University of Technology Sydney. Previously B.Tech CS with focus on IoT. I believe the best way to learn is to explain. That's why I'm documenting tech concepts with simple analogies (@sreekarreddy.com). AWS Certified • Azure AI Certified • Neo4j Professional • Google Data Analytics When not coding: exploring Sydney, working on side projects, and teaching tech to anyone who'll listen.
Local libraries instead of one central
Day 29 of 149
👉 Full deep-dive with code examples
The Library Story
Imagine there's basically one big library for your whole country.
People from Sydney, Melbourne, Perth... all end up going to that one place to borrow books.
Traffic jams everywhere! 🚗🚗🚗
Better idea: Put small libraries in every city!
CDN = Content Delivery Network
Your website is hosted in Sydney.
Someone from Tokyo visits → data travels allllll the way from Sydney. Slow!
With CDN: CDN copies your files to servers worldwide:
- Tokyo → Tokyo server ✅
- London → London server ✅
- New York → New York server ✅
Most people get files from a nearby location.
What Gets CDN'd
- Images
- CSS and JavaScript files
- Videos
- Static pages
Anything that doesn't change often.
Famous CDNs
- Cloudflare
- AWS CloudFront
- Akamai
- Fastly
In One Sentence
CDN copies your files to servers around the world so users download from a server near them, making your site faster.
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