How does proxy server cache documents?
Some proxy servers let you cache internet documents for clients within the local area network. Caching documents means keeping a local copy of internet documents, so that the server doesnt need to request them over and over again. Caching is more effective on the proxy server than on each client system. This saves disk space because only a single copy is cached. Caching on the proxy server means more documents that are often referenced by multiple browsers can be cached more efficiently. The system administrator can predict which documents are worth caching for a long time and which are not. It is easy to configure an entire workgroup to use the proxy servers cache of documents. This reduces the load on the server by allowing it to get information from the cache when responding to subsequent client requests for the same data. Caching also makes it possible to browse the Web even if a Web server, or even the external network, is down, as long as one can connect to the proxy server. This
