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HTTP/2 support in Azure CDN | Microsoft Docs |
Azure Content Delivery Network supports HTTP/2, which has benefits over HTTP/1, such as multiplexing & concurrency, header compression, and stream dependencies. |
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azure-cdn |
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5/04/2017 |
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HTTP/2 is a major revision to HTTP/1.1. It provides faster web performance, reduced response time, and improved user experience, while maintaining the familiar HTTP methods, status codes, and semantics. Though HTTP/2 is designed to work with HTTP and HTTPS, many client web browsers only support HTTP/2 over TLS.
The benefits of HTTP/2 include:
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Multiplexing and concurrency
Using HTTP 1.1, making multiple resource requests requires multiple TCP connections, and each connection has performance overhead associated with it. HTTP/2 allows multiple resources to be requested on a single TCP connection.
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Header compression
By compressing the HTTP headers for served resources, time on the wire is reduced significantly.
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Stream dependencies
Stream dependencies allow the client to indicate to the server which resources have priority.
All of the major browsers have implemented HTTP/2 support in their current versions. Non-supported browsers automatically fallback to HTTP/1.1.
| Browser | Minimum Version |
|---|---|
| Microsoft Edge | 12 |
| Google Chrome | 43 |
| Mozilla Firefox | 38 |
| Opera | 32 |
| Safari | 9 |
Currently, HTTP/2 support is active for all Azure CDN profiles. No further action is required from customers.
To see the benefits of HTTP/2 in action, see this demo from Akamai.
To learn more about HTTP/2, visit the following resources:
To learn more about Azure CDN's available features, see the Azure CDN Overview.