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THIS CONTENT IS CURRENTLY AVAILABLE IN ENGLISH ONLY. WE ARE CONSTANTLY WORKING
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Performance & Reliability
CDN DNS Argo Smart Routing Load Balancing Web Optimizations China Network
Video Streaming & Delivery
Cloudflare Stream Stream Delivery
Advanced Security
DDoS Protection WAF Rate Limiting SSL / TLS DNSSEC Cloudflare Access Cloudflare
Spectrum Argo Tunnel
Insights
Analytics
Cloudflare for Developers
Cloudflare Workers Mobile SDK
Cloudflare Marketplace
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Cloudflare for Everyone
1.1.1.1
Performance
Accelerate Internet Applications Accelerate Mobile Experiences Ensure
Application Availability
Security
Mitigate DDoS Attacks Prevent Customer Data Breaches Stop Malicious Bot Abuse
Industries
SaaS Publishers Public Sector
Partnerships
Partner Program Hosting Provider Referral Reseller / MSP OEM / Technology
Workers Partner Program
Integrations
IBM Cloud WordPress Google Cloud Magento Acquia Rackspace Microsoft Azure
Kubernetes WP Engine
Develop
API Guide Developer Hub Developer Fund Documentation
Explore
Case Studies Cloudflare in China Network Map Webinars Product Updates White
Papers GDPR
Learn
DDoS Learning Center CDN Learning Center DNS Learning Center Security Learning
Center Serverless Learning Center
Connect
Blog Contact Sales Community Support
Contact
+1 (888) 99 FLARE
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   Performance & Reliability
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   Video Streaming & Delivery
   Cloudflare Stream Stream Delivery
   Advanced Security
   DDoS Protection WAF Rate Limiting SSL / TLS DNSSEC Cloudflare Access
   Cloudflare Spectrum Argo Tunnel
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   Analytics
   Cloudflare for Developers
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   Cloudflare Marketplace
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 * Solutions
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   Accelerate Internet Applications Accelerate Mobile Experiences Ensure
   Application Availability
   Security
   Mitigate DDoS Attacks Prevent Customer Data Breaches Stop Malicious Bot Abuse
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   Learn
   DDoS Learning Center CDN Learning Center DNS Learning Center Security
   Learning Center Serverless Learning Center
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   Blog Contact Sales Community Support
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DOES MY BROWSER SUPPORT HTTP/3 & QUIC?

When loading this page from Cloudflare's edge network, your browser used HTTP/2.

This page is HTTP/3 & QUIC enabled. Try reloading a few times to spring it into
action.

Not all HTTP clients have HTTP/3 & QUIC support configured. See our
documentation for more information about how to check and configure your
favorite client such as Chrome, Firefox or curl.




AVAILABLE FOR ALL CLOUDFLARE ZONES

Cloudflare's QUIC & HTTP/3 is generally available to all zones. You can control
whether it is enabled or disabled using a toggle on the Network tab of your
dashboard.




NEW TO QUIC?

QUIC is a new transport protocol being developed in the Internet Engineering
Task Force (IETF). It offers reliability, security and multiplexing by default.

HTTP/3 is a new version of HTTP that sits on top of QUIC. It leverages the new
transport features to fix performance problems such as Head-of-Line blocking.
This enables web pages to load faster, especially over troublesome networks.

If you’re new to QUIC and need to learn more about the protocol, the following
resources will help you gain a better understanding.

 * HTTP/3: the past, present, and the future
 * HTTP/3: From root to tip blog
 * The QUICening blog
 * Get a head start with QUIC blog
 * Road to QUIC blog
 * QUIC implementations repository
 * IETF standard working group


FASTER HANDSHAKES

QUIC handshakes are faster by design when compared to the equivalent TCP & TLS.

Since QUIC uses TLS 1.3, it can benefit from zero roundtrip time (0-RTT)
connection resumption. Check out our 0-RTT blogpost to understand more about
this feature.


POWERED BY DELICIOUS QUICHE

Quiche is Cloudflare's own open-source implementation of the QUIC and HTTP/3
protocols written in Rust.

The following articles provide some background.

 * Enjoy a slice of QUIC, and Rust! blog
 * Experiment with HTTP/3 using NGINX and quiche blog




CONTINUING DEVELOPMENTS

Cloudflare will continue to make updates to its QUIC implementation as the IETF
makes progress towards finalizing the protocol standard.

Since launching QUIC & HTTP/3 support we've continued to measure performance and
deploy optimisations such as new Congestion Control algorithms.




GET STARTED

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