How Does Netflix Work?

Intelligence Brief: The Architecture of Global Streaming

Netflix accounts for over one-third of downstream internet traffic in the US during peak hours. Delivering high-fidelity video to millions simultaneously requires a sophisticated hybrid infrastructure that bypasses traditional internet bottlenecks through localized hardware and massive cloud processing.

The days of CRT televisions and VHS rentals are a distant memory, replaced by the instant-gratification "glow" of streaming. But how does Netflix fling massive video files to millions of screens without breaking the internet?

The Open Connect Strategy

To solve the problem of latency and bottlenecks, Netflix utilizes its own bespoke Content Delivery Network (CDN). Rather than relying on a single server farm, they deploy Open Connect Appliances (OCAs) directly into the facilities of Internet Service Providers (ISPs).

Localization: These boxes hold up to 280 terabytes of video, meaning your movie is likely streaming from an appliance at your local ISP rather than across the country.
Off-Peak Updates: Catalog updates are pushed to these boxes during early morning hours when traffic is lowest, ensuring the library is ready for peak-time binge-watching.
High Throughput: A single appliance can push over 90 gigabits per second—enough for 13,000 people to watch HD content simultaneously.

The Hybrid Cloud: AWS Integration

While Open Connect handles the heavy lifting of video transmission, everything else—logins, billing, search, and your personalized recommendations—runs on Amazon Web Services (AWS).

"Why would Amazon host their biggest competitor? Because Amazon wants to be the global standard for cloud processing, and Netflix’s multi-million dollar deal is simply good business."

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