Cloudflare already supports the HTTP/3 protocol, which is already included in Chrome Canary and will soon be added to Firefox Nightly. The new standard will make our web browsing much faster and more secure.
But let's start from the beginning:
Browsers, web servers, and other Internet infrastructure services are starting to support a new standard called HTTP/3. This protocol uses QUIC. It is a more modern version of HTTP that browsers use to communicate with servers and send or receive data.
HTTP/3 has been rewritten from the ground up to send data faster and handle errors better. It also has built-in encryption.
This means more speed and security. Of course, the average web user doesn't need to know anything about HTTP/3 and QUIC. But webmasters and developers will be busy for a while until one day, the browsers and websites you use start communicating over HTTP/3.
The original version of HTTP used the Transmission Control Protocol (TCP). It was first described in 1974, but was never designed to be a fast data transfer protocol. Google attempted to fix many of the problems TCP had with a new protocol called SPDY, which it used in HTTP/2.
HTTP/2 began to be widely released in late 2015, with features like data compression and adding multiple requests to a single TCP connection to speed things up somewhat.
As of September 2019, W3Techs reports that HTTP/2 is currently used by 41% of websites.
HTTP/3 now, in addition to being rewritten from scratch, instead of using TCP, uses Google's QUIC protocol.
HTTP/3 was originally known as HTTP-over-QUIC and includes TLS 1.3 encryption.
QUIC (Quick UDP Internet Connections) was designed to be faster with lower latency than TCP. Unlike TCP, an error such as the loss of a small piece of data will not cause the connection to be dropped, but the connection will continue and attempt to repair the problem. QUIC will continue to transfer other data while attempting to fix the problem.
QUIC was added to Google Chrome in 2013, and the browser uses it when communicating with other Google services or with some other websites like Facebook. However, QUIC does not yet exist as a standard built into other browsers. With HTTP/3 technology, we will soon see it in other browsers.
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