Figure is an interactive media element that is showing three servers and three client computers.  The learner can select each and get a brief description.  The three servers are paired according to their use, and they are an e-mail server that runs e-mail server software used by the client computer to send and receive e-mail.  Next is a web server that hosts web pages and clients use a web browser to access those pages.  The third server is a file server which stores files for users and is accessed by a file client to access the files.