![]() ![]() Since the retransmission has occurred, which means that something happens in this round-trip time or some congestion may occur in a network. But this algorithm does not consider the Sample RTT when retransmitting. In the above two scenarios, retransmission occurs, and we have considered the Sample RTT. This algorithm gave a simple solution that collects the samples sent at one time and does not consider the samples at the retransmission time for calculating the estimated RTT. To overcome the above problems, a simple solution is given by the Karn/Partridge algorithm. In this case, we are assuming that ACK belongs to the retransmission due to which the SampleRTT is coming to be very small. If we consider the second scenario, two same packets are sent so duplicity occurs in this case.In this case, we are assuming that ACK belongs to the original transmission due to which the SampleRTT is coming out to be very large. If we consider the first scenario, the retransmission is done for the lost packet.Here, ACK does not mean to acknowledge a transmission, but actually, it acknowledges a receipt of the data.
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