Not necessarily. You can make an ajax request to a static resource. The server doesn't have to be a dynamic process. Static resources are just files. A client-

Not necessarily. You can make an ajax request to a static resource. The server doesn't have to be a dynamic process. Static resources are just files. A client-side JavaScript Twitter could be done this way. Every tweet, or timeline can be pre-baked into a static json file, and ajaxed in. Twitter can then be simplified to a backend application that updates these files. Granted, tweeting is a separate matter; that requires an endpoint that processes data.