Understanding proxy is a server that provides a service to forward any requests the user to another server computer that are on the internet. Easier proxy server is a server or a computer program with a role as a link between a user's computer to the Internet.
Proxy has an important role in a computer network, of which are used as follows:
1. Conecting sharing
Conecting Sharing is used as a proxy intermediary and liaison retrieval of data from a specific address ip address the ip address of the other.
With this proxy can block certain IP addresses that can not be accessed by the computer user.
Caching computer users could easily access certain web pages that have been accessed before because the proxy already stores data on the web.