Summary: The Golden Rules of Object Storage + CDN
- Direct upload for uploads: Multipart for large files, STS for security
- Layered caching: Browser → CDN → Origin, cache at every layer
- Serve users nearby: Intelligent DNS + global node coverage
- Never relax on security: HTTPS + hotlink protection + access control
- Monitor costs: Hit ratio, bandwidth, storage tiering—continuously optimize
This architecture underpins the vast majority of static resource access on the internet. Understand it, and you understand the cornerstone of modern web performance optimization.