A proxy caches content, much like your web browser will cache web data in order to speed up access to that site the next time you visit it. A proxy can also mean anonymizing the server (a proxy server known as a reverse proxy) that actually stores content, which is the purpose of the Mobile Access service in Mac OS X and the reverse proxies that can be used on each site. The proxy in Mac OS X Server caches pages of a web site that are visited so that as each additional user of your local network visits the site they do not have to download images and graphics,…