Consider the figure below, which plots the evolution of TCP's congestion window at the beginning of each time unit (wher

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Consider The Figure Below Which Plots The Evolution Of Tcp S Congestion Window At The Beginning Of Each Time Unit Wher 1 (147.7 KiB) Viewed 33 times

Consider the figure below, which plots the evolution of TCP's congestion window at the beginning of each time unit (where the unit of time is equal to the RTT; i.e. a transmission round). TCP Reno is used here. In the abstract model for this problem, TCP sends a “flight” of packets of size cwnd (the congestion window) at the beginning of each time unit. The result of sending that flight of packets is that either (i) all packets are ACKed at the end of the time unit, (ii) there is a timeout for the first packet, or (iii) there is a triple duplicate ACK for the first packet. 20 18 16 web 4 208 cwnd 14 12 10 6 4 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Transmission round Which of the following events occurred at the 9th transmission round and triggered a new TCP phase? O none of the mentioned O triple duplicate ACK O all packets were ACKed O slow start threshold reached O timeout