1.Implicit Retransmissions:
- P transmits I-frame and starts timer
- S ACKs on receipt of error free I-frame
- P can transmit another I-frame on receipt of error free
ACK
corrupt frames are discarded (I-Frames and ACK frames)
- P retransmits I-frame on timeout (w/o ACK)
- S
discards duplicate I-frames and ACKs duplicate (ACK corrupted)
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