Web proxy caching stores copies of frequently accessed Web objects (such as documents, images, and articles) close to users and serves this information to them. Internet users get their information faster, and Internet bandwidth is freed for other tasks. Internet users direct their requests to Web servers all over the Internet. For a caching server to serve these requests, it must act as a Web proxy server. A Web proxy server receives user requests for Web objects and either serves the requests or forwards them to the origin server (the Web server that contains the original copy of the requested information). InterSAT can implement for you both transparent proxy caching, where the user's client software (typically a browser) is unaware that it is communicating with a proxy, and explicit proxy caching, where the user's client software must be configured to send requests directly to the proxy.
The following overview illustrates how Content Gateway serves a user request.