What is Proxy server?

A proxy server is a server that retrieves Web pages for you, providing only its own identity to the sites it visits. Requesting data comes first to the proxy, and through the requested proxy, the data is transmitted to you. Usually, they are used to increase the effective network speed of your connection to the Internet because they save informations and files that are requested by many many users in a special database what is called "cache". When you retrieve pages behind proxy, then proxy server first look into "cache" and if the same information is found you will gets directly because of previosly storing in "cache".