What is the role of a proxy server in a network?

A proxy server serves as an intermediary for requests from clients, which is the function that aligns with its primary role in a network. When a user requests a resource from the internet, such as a web page, the request is first sent to the proxy server. The proxy then forwards this request to the appropriate server on the internet. Once the response is received, the proxy server sends the data back to the client.

This setup offers several benefits, including improved security, anonymity, and content filtering. For instance, it can cache data to speed up access to frequently requested resources or enforce security policies by controlling access to certain content. By operating as an intermediary, the proxy also masks the client’s IP address, enhancing privacy for users.

This role is distinct from the other options provided. For example, directly connecting users to the internet implies a lack of intervention or filtering, which does not characterize the function of a proxy. While some proxies can encrypt data, the task of encrypting data traffic without user intervention does not encompass the primary role of all proxy servers. Moreover, blocking all incoming network requests is not a typical function of a proxy server, as it is more focused on managing outbound requests and responses while facilitating communication.