How Netflix’s Open Connect CDN Powers Seamless Streaming Worldwide

Last month Netflix’s hit series Squid Game demonstrated the platform’s ability to deliver flawless streaming to a global audience, highlighting the importance of its underlying infrastructure.

If luck favors them, Netflix’s solution could eventually become an industry standard.

The Secrets of Open Connect

Over the past ten years Netflix built a private server network called Open Connect . Gina Haspilaire, Vice President of Open Connect, explained that Netflix realized it needed a dedicated infrastructure to handle the massive traffic it expected.

Open Connect is Netflix’s own content‑delivery network that distributes TV shows and movies worldwide. Launched in 2012, it ships physical appliances to Internet Service Providers (ISPs) so that copies of Netflix content are cached locally, reducing the number of hops and easing network congestion.

Most streaming services rely on third‑party CDNs, which adds latency and cost. By contrast, Netflix’s internal CDN serves only Netflix content, allowing it to place servers as close as possible to end users.

Netflix has invested roughly $1 billion in Open Connect since its inception and now operates about 17 000 servers in 158 countries, prioritising deployment based on user density and ISP partnership ease.

To mitigate traffic spikes, Netflix stores three quality‑tiered copies of each title on its servers. If a user’s connection degrades, the system automatically switches to a lower‑bitrate version, ensuring uninterrupted playback.

Netflix also predicts popular titles and pre‑positions their copies on flash‑type servers for fast delivery, while less‑demanded content remains on storage‑type servers (up to 350 TB). During the COVID‑19 pandemic, Open Connect proved its resilience under unprecedented streaming demand.

Why It Works

Netflix’s goal is to guarantee a smooth viewing experience regardless of ISP quality. By deploying multiple bitrate replicas and dynamically adjusting streams, viewers never notice network fluctuations.

The network’s two server classes—flash and storage—allow Netflix to move popular content to faster flash servers, further improving performance.

The King of Streaming

Beyond Open Connect, Netflix pioneered cloud‑native practices, migrating to AWS early, adopting immutable infrastructure with AMI images, and open‑sourcing its micro‑service stack (Zuul, Eureka, Hystrix, Archaius). These technical choices have cemented Netflix’s position as a benchmark for large‑scale streaming operations.

Reference: The Verge – Netflix CDN Open Connect