# HTTP over QUIC

Il layer HTTP si occupa dei trasporti in stile HTTP, inclusa la compressione degli header utilizzando QPACK - simile alla compressione usata in ambito HTTP/2, detta HPACK.

L'algoritmo HPACK si basa sulla consegna *ordinata* dei flussi quindi non è stato possibile riciclarlo per HTTP/3 senza apportarvi modifiche, visto che QUIC permette la consegna di flussi al di fuori dell'ordine predefinito. QPACK può essere visto come una versione di [HPACK ](https://httpwg.org/specs/rfc7541.html) adattata su misura per 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/it/the-protocol/feature-http.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.
