# Experience from HTTP/2

The HTTP/2 specification RFC 7540 was published in May 2015, just a month before QUIC was brought to IETF for the first time.

With HTTP/2, the foundation for changing HTTP over the wire was laid out and the working group that created HTTP/2 was already of the mindset that this would help iterating to new HTTP versions much faster than it had taken to go to version 2 from version 1 (about 16 years).

With HTTP/2, users and software stacks got used to the idea that HTTP can no longer be assumed to be done with a text-based protocol in a serial manner.

HTTP-over-QUIC (HTTP/3) builds upon HTTP/2 and follows many of the same concepts but moves some of the specifics from the HTTP layer as they are covered by QUIC.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://http3-explained.haxx.se/en/proc/proc-h2.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.