BeginnerPhone
2 min
Purpose of a CDN
WebPerformanceNetworking
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Interview Question
What problem does a CDN solve and how does it improve user-perceived performance?
Key Points to Cover
- Caches static content at edge locations closer to users
- Reduces latency and origin bandwidth
- Can provide TLS termination, DDoS protection, and compression
Evaluation Rubric
Explains edge caching/latency reduction40% weight
Mentions origin offload/bandwidth30% weight
Notes extra features (TLS/DDoS/compress)30% weight
Hints
- 💡Think cache hit ratio and TTLs.
Potential Follow-up Questions
- ❓How do cache-control headers affect CDNs?
- ❓What about dynamic content?
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