In the HTTP sessions section, we described a server that was doing most of the work and browser was responsible for relaying user inputs to the server, parsing the HTML document returned back from the server, and rendering it in the browser for the user. REST allows us to split the application into a server and client. A server (backend) is responsible for executing business logic, and a client (frontend) is responsible for communicating user interaction to the server. It might sound like not much has changed; however, the remaining properties of REST architecture will be more apparent.