What is A proxy server ? A proxy server is an intermediary server that sits between a client device, such as a computer or mobile device, and a destination server on the Internet. When a client device sends a request to access a resource on the Internet, the request is first sent to the proxy server. The proxy server then evaluates the request, and either serves the request by retrieving the resource from the destination server on behalf of the client, or blocks the request if it violates any security policies. Proxy servers are often used to improve security and performance in computer networks. By acting as a gateway between client devices and the Internet, they can filter and block malicious traffic, and cache frequently accessed content to reduce the amount of bandwidth used. They can also be used to bypass geographical restrictions on Internet content, by routing traffic through servers located in different countries. There are different types of proxy servers, including web...