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I have a doubt here. When timeout occurs, the congestion windows size is 18MSS.and Till now total RTT before this timeout were 6.

Now, my threshold will be set to 9MSS and congestion window will start from 1 MSS.So, now when I send 1MSS window and receive it's ack and then my window size changes to 2MSS, will this RTT be counted as 7th RTT or the 8th RTT?

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MSS AT START OF 1st Transmission:1MSS

2ND: 2MSS

3RD: 4MSS

4TH: 8MSS

5TH: 16MSS(THRESHOLD REACHED)

6TH: 17MSS

7TH:18MSS

NOW TIMEOUT OCCURED AT END OF 7TH MSS

 

SO NEW TH=9MSS

8TH:1MSS

9TH: 2MSS

10TH:4MSS

11TH: 8MSS

12TH: 9MSS(THRESHOLD REACHED)

13TH: 10MSS

14TH:  11MSS

NOW AT END OF 14th transmission SIZE :12 MSS

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