CDN
Domain: Internet & Web
🎯 Motivation
Content Delivery Network - servers around the world that cache content close to users. Faster delivery.
📋 Concrete Example
CDN: your server is in Hong Kong. User in New York: 200ms latency. CDN has a copy in New York: 20ms latency. 10x faster. CDN caches content globally.
🔗 Analogy
A CDN is like franchise stores around the world - instead of buying from the one factory in Hong Kong (slow delivery), you buy from the local franchise (fast delivery). Same product, closer source.