What problem does a CDN solve and how does it improve user-perceived performance?
- Caches static content at edge locations closer to users
- Reduces latency and origin bandwidth
- Can provide TLS termination, DDoS protection, and compression
- 💡Think cache hit ratio and TTLs.
- ⚠️Failing to explain *why* edge locations help (i.e., reducing physical distance and latency).
- ⚠️Overlooking the benefit of reducing load and bandwidth on the *origin server*, focusing solely on user experience.
- ⚠️Not clearly differentiating between static content (cached) and dynamic content (typically not cached by default).
- ⚠️Missing key additional services like TLS termination, DDoS protection, or compression capabilities.
- ⚠️Using technical jargon like 'PoP' or 'RTT' without a brief, beginner-friendly explanation.
- ❓How do cache-control headers affect CDNs?
- ❓What about dynamic content?
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