1.The user opens a web page that contains static content such as media, JavaScript, or CSS.
2. The user's browser automatically connects to the proxy server. This could be a content delivery network (CDN) that caches content in different locations around the world.
3. The browser requests resources from the proxy server. The proxy server checks whether it not only owns the resource, but also whether it is the most recent. If the resource is old or missing, the agent gets a new copy from the source.
4. The proxy passes resources to the browser. If the proxy must obtain a new copy, it caches it for future use.
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