🌱 System Design (Beginner) · Data Layer · cozy lesson
CDN & Edge Caching
9 min · 1 min read · no scary math, promise
🤖
You’ve got this. Read a little, play a little — I’ll wait. No rush.
Images, JS, product photos: Cache-Control: public, max-age=31536000, immutable. API: short TTL or stale-while-revalidate. Purge on deploy by version, not wildcard.
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Check your understanding
Correct answers earn XP (once each).
1. CDN helps most with…
2. Cache bust trick?
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