What are the limitations of AJAX ?
Ajax is primarily a client/server technology. Client nodes in the web do not typically run web servers that can respond to HTTP GET and POST requests. Since clients cannot directly communicate with each other, any distributed application developed using
Ajax would require a central web server system to negotiate requests between clients. Client A could generate events/data for and respond to events/data from Client B however both would need to connect to a common web server to facilitate the communication.