What is Proxy?

In A PC or A computer networks, a Proxy server is an another server (a computing system or an app or addon) that acts as an intermediary for requests from clients PC seeking resources from mother servers. When A client connects to the Proxy server, requesting some service, such as a file, just a connection, visit a web page, or other resource that might be 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 (WWW) and providing anonymity or to surf the web without showing the real identity, IP address, MAC address or any other information that may identify the real user.

                  What is Proxy

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.
Types of Proxy:

1.A Proxy server that used to just passes the requests and only responses unmodified is usually called a gateway or sometimes a tunneling Proxy.
2.A forward Proxy is an Internet-facing Proxy used to retrieve from a wide range of sources (in most cases anywhere on the World Wide Web).
3.A reverse Proxy is usually an Internet-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 traffic load-balancing, authentication users, decryption of data or caching information.
A Proxy can keep the internal network structure information of a company secret by using network address translation (sproof), which can help the security of the internal network. This makes requests from machines and users on the local network anonymous. Proxies can also be combined with firewalls or antivirus software.
An incorrectly configured Proxy can provide access to a network otherwise isolated from the Internet.

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