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System Design for Python Juniors
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Module 6 · Real-World System Design Cases
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Design Netflix video streaming
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📝 **Question:** Why doesn't the origin server stream video directly? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
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📝 **Question:** Why doesn't the origin server stream video directly? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
A
It does — Netflix's origin region handles every playback session and CDN edges only cache the title catalog metadata.
B
CDN edges cache pre-transcoded chunks — origin sees ~1% of requests, cuts bandwidth cost 100× and latency dramatically.
C
DRM encryption requires a single origin endpoint per session, so the playback stream must terminate at one Netflix-controlled region per user.
D
Bandwidth is effectively free for Netflix's peering agreements, so the architecture optimizes for storage cost over egress cost.
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