---
title: TLS and HTTP
summary: null
url: https://www.fastly.com/documentation/reference/vcl/functions/tls-and-http
---

- [early_hints](https://www.fastly.com/documentation/reference/vcl/functions/tls-and-http/early-hints/)
- [h2.disable_header_compression](https://www.fastly.com/documentation/reference/vcl/functions/tls-and-http/h2-disable-header-compression/)
- [h2.push](https://www.fastly.com/documentation/reference/vcl/functions/tls-and-http/h2-push/)
- [h3.alt_svc](https://www.fastly.com/documentation/reference/vcl/functions/tls-and-http/h3-alt-svc/)