A reverse proxy is a server that has as its main functionality to receive requests from an external network, usually the Internet, and forward them to servers on an internal network.

A Content Delivery Network, can be described as a set of servers, distributed globally, with the purpose of providing content to users in an optimized way and in the shortest possible time.

Widely used in applications with high volume of simultaneous access, a load balancer is a computational resource used to perform load distribution between two or more servers of an application.