Comet is an Ajax technique (also called long polling) that uses the ability of a server to hold poll requests until either a timeout or an event occurs. A server that is holding a poll request has the ability to send a response at anytime to communicate an event to the client. So long as the client browser supports multiple connections to the server, Comet allows efficient two way communication between Ajax client and server.[img]http://www.webtide.com/downloads/longpoll.gif[/img]
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