Design a Content Delivery Network (CDN) that serves static and dynamic content with low latency globally. **Functional Requirements:** - Cache and serve static content (images, CSS, JS, videos) from edge servers - Origin pull: fetch from origin server on cache miss - Cache invalidation / purging - Support for custom domains and SSL certificates - Analytics: hit rate, bandwidth, latency per edge location **Non-Functional Requirements:** - Sub-100ms response time for cached content globally - 99.99% availability - Support for terabytes of cached content per edge node - Handle traffic spikes (e.g., viral content) **Scale:** - 200+ edge locations worldwide - 10M requests per second globally - Petabytes of content served daily

Content Delivery Network (CDN)

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Design a Content Delivery Network (CDN) that serves static and dynamic content with low latency globally.

How would you handle video streaming (large files, seek support, adaptive bitrate)?
How would you implement edge computing for dynamic content personalization?
How would you protect against DDoS attacks at the edge?

Functional Requirements

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Non-Functional Requirements

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