Hard Design: Video Streaming Platform (YouTube/Netflix)

Why are CDN cache TTLs set to very long (1 year) for video segments?

— Tests your understanding of this concept.

Answer Options

A To reduce CDN cost

B Video segments are immutable — once created they never change, making long TTL safe and maximizing cache hit rate

C CDN requires minimum 1-year TTL

D To improve video quality

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This question is from the Design: Video Streaming Platform (YouTube/Netflix) topic (System Design Cases).

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