<P> In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers . A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource available from a different server and the proxy server evaluates the request as a way to simplify and control its complexity . Proxies were invented to add structure and encapsulation to distributed systems . Today, most proxies are web proxies, facilitating access to content on the World Wide Web, providing anonymity and may be used to bypass IP address blocking . </P> <P> A proxy server may reside on the user's local computer, or at various points between the user's computer and destination servers on the Internet . </P> <Ul> <Li> A proxy server that passes unmodified requests and responses is usually called a gateway or sometimes a tunneling proxy . </Li> <Li> A forward proxy is an Internet - facing proxy used to retrieve from a wide range of sources (in most cases anywhere on the Internet). </Li> <Li> A reverse proxy is usually an internal - facing proxy used as a front - end to control and protect access to a server on a private network . A reverse proxy commonly also performs tasks such as load - balancing, authentication, decryption or caching . </Li> </Ul>

Where would a proxy server be located in a network
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