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Consider the following statements regarding the slow start phase of the TCP congestion control algorithm. Note that cwnd stands for the TCP congestion window and MSS window denotes the Maximum Segments Size:

  1. The cwnd increases by 2MSS on every successful acknowledgment
  2. The cwnd approximately doubles on every successful acknowledgment
  3. The cwnd increases by 1MSS every round trip time
  4. The cwnd approximately doubles every round trip time

ref link: https://gateoverflow.in/204088/gate2018-14

Here  we double the congestion window after receiving the ACK right, without getting the ack how we blindly double in RTT time. If that statement is true I will get option 2

Can someone please clarify on above statement

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