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

A proxy server acts as an intermediary for requests from clients, which is a fundamental aspect of its role in network configurations. When a client makes a request for resources (like web pages or files), the proxy server intercepts this request and forwards it to the intended destination on behalf of the client. Once the server responds, the proxy then sends the response back to the client.

This configuration provides several benefits, such as improved performance through caching of frequently accessed resources, enhanced security by hiding the client's IP address from the external network, and the ability to implement filtering and logging of user activities for better management of network resources. Overall, the proxy server serves as a crucial component in managing network traffic and providing security and efficiency in networking environments.

The other options do not accurately reflect the primary function of a proxy server. For example, while a proxy may enhance network security, it doesn’t function as a backup for data servers or create separate networks for each user, nor does it directly connect users to the internet without the intermediary role.