How do you communicate between applet and servlet?

The communication between an Applet and Servlet can occur through 'Http Tunneling' with Object serialization.It is technique through which an applet can send data to servlet through object serialization bypassing firewall over HTTP.A socket connection is established from client to server and in the process if there is any firewall at client side then that can also be bypassed but does not work in case if there is a firewall on remote host server side.
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