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---
pcx_content_type: concept
title: How Cloudflare CDN works
title: How Cloudflare works
sidebar:
order: 2

---

import { GlossaryTooltip } from "~/components"
import { Stream, GlossaryTooltip } from "~/components"

To optimize your website or web application, Cloudflare provides [DNS](https://www.cloudflare.com/learning/dns/what-is-dns/) and [CDN](https://www.cloudflare.com/learning/cdn/what-is-a-cdn/) services, so we can [reverse proxy](https://www.cloudflare.com/learning/cdn/glossary/reverse-proxy/) the web traffic to and from your domain.

<Stream id="89f8aaf01e4cadd0c777eded7ef4cca2" title="Onboard your domain to Cloudflare" thumbnail="2s" />

## DNS explained

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