Proxy, which is short for “proxy server,” is a type of intermediary computer or an application program that acts as a go-between for requests from clients seeking resources from other servers. A proxy acts as an intermediary, or gateway between the user and the internet, and serves various purposes. It is used to hide a user’s IP address for both security and privacy, or to access websites that are blocked by a firewall.

A proxy can also be used to increase speed, cache webpages, or filter network requests from sources such as malicious software and spam. It may also help reduce internet access costs for an organization by caching frequently requested webpages, as well as providing extra security and privacy features.

Proxy servers can be divided into four main categories:

* Transparent proxies – These act as intermediaries between a client and a server. They mask the identity of the user but do not change the request or response in any way, such as altering the request header or request body.

* Anonymous proxies – Where requests are forwarded to a proxy server, it then sends its own requests for the requested resource, thus hiding your true identity.

* High Anonymity proxies – Also known as elite proxies, these proxies are designed to work as intermediaries between a client and a remote host and provide the highest level of anonymity possible.

* Reverse proxies – Unlike the other proxy types, a reverse proxy works as a gateway between a web server and its clients. These proxies are typically used to boost the speed and performance of a website or secure data transmissions without any client-side configuration.

In conclusion, a proxy is an intermediary computer or application that provides services to requests from other computers, such as hiding an IP address, caching webpages, masking a users identity, increasing speed, or filtering network requests. It is an important tool for security and privacy, as well as for organizations looking to save on internet access costs.

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