What type of device acts as an intermediary between a web client and a web server?

A device that acts as an intermediary between a web client and a web server is typically called a proxy server. It forwards requests from clients to the server and returns the server's responses back to the clients. Proxy servers can enhance security, improve performance through caching, and allow for content filtering or access control. They serve as a gateway, managing and controlling the communication between clients and servers.