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for Web Authors and Webmasters This is an informational document.

This cache is especially useful when users hit the “back” button or click a link to see a page they’ve just looked at.

Also, if you use the same navigation images throughout your site, they’ll be served from browsers’ caches almost instantaneously.

Web proxy caches work on the same principle, but a much larger scale.

Proxies serve hundreds or thousands of users in the same way; large corporations and ISPs often set them up on their firewalls, or as standalone devices (also known as ).

Because proxy caches aren’t part of the client or the origin server, but instead are out on the network, requests have to be routed to them somehow.

One way to do this is to use your browser’s proxy setting to manually tell it what proxy to use; another is using interception.; rather than just having one person using them, they usually have a large number of users, and because of this they are very good at reducing latency and network traffic.There are two main reasons that Web caches are used: If you examine the preferences dialog of any modern Web browser (like Internet Explorer, Safari or Mozilla), you’ll probably notice a “cache” setting.This lets you set aside a section of your computer’s hard disk to store representations that you’ve seen, just for you.The browser cache works according to fairly simple rules.It will check to make sure that the representations are fresh, usually once a session (that is, the once in the current invocation of the browser).