A method and system for transferring data between a sender and a receiver in a packet-based network is disclosed. The method comprises establishing a data channel, establishing a feedback channel, sending data to the receiver over the data channel, sending an acknowledgment to a sender on the feedback channel at a predetermined interval, using the acknowledgment to track data sent successfully and unsuccessfully to the receiver, resending data unsuccessfully sent to the receiver, and self-tuning to optimize throughput based upon the acknowledgement and react to changing network conditions.