Reverse Ajax, not unlike DHTML, LAMP, Ajax and SPA, is not a technology in itself, but a term that refers to the use of a group of technologies together. These technologies include:
Ajax for handling the data on the client side in a smooth and interactive way, and passing data between server and client.
A technology for pushing server data to a browser
Comet, a connection between a server and client is kept open, by slowly loading a page in a hidden frame.
Piggyback, extra data is added (piggybacked) onto a normal client-server interaction.
Polling, the client repetitively queries (poll) the server.
Reverse Ajax is different from Ajax, as Reverse Ajax is a suite of technologies for pushing data from a server to a client. These technologies are built upon an Ajax framework.
