Build it: CDN
An interactive sandbox where you drag real components together, connect them, and run a live traffic simulation to see where the design breaks.
Challenge: Users around the world send <strong>200 r/s</strong> of traffic. Your origin server can only handle <strong>80 r/s</strong> and lives far away from most users. Drop in CDN edges so users get served locally. Origin should only see the cache misses.