1 votes 1 votes I am getting answer as 9, someone please post their solution stepwise, that would be of great help to identify the mistake. Computer Networks computer-networks congestion-control made-easy-test-series + – Markzuck asked Dec 26, 2018 edited Mar 5, 2019 by Rishi yadav Markzuck 768 views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply Gupta731 commented Dec 26, 2018 reply Follow Share Initial Threshold=12 2 4 8 12 13 14 15 Now timeout. New threshold = 7, start again with 2MSS from the 8th transmission 2 4 7 8 9 10 So as we can see at the end of 12th transmission congestion window size is 10. 0 votes 0 votes balchandar reddy san commented Dec 26, 2018 reply Follow Share After the timeout new window size will be set to 1MSS and not to 2MSS.. reference: https://gateoverflow.in/2156/gate2012-45 I assume the solution is given as 10MSS because either the new threshold is set to 8MSS instead of 7 or the given solution is wrong. 0 votes 0 votes Markzuck commented Dec 26, 2018 reply Follow Share yes, I also took 1MSS after Timeout so whats the final answer then? 0 votes 0 votes Hemanth_13 commented Dec 26, 2018 reply Follow Share "The question asks the window size at the end of 10th transmission. The window size increases by 1 after the acknowledgment are received, not at the end of the transmission. " Observe this statement in the above link. you got 9 add 1 to it. This will make answer as 10. 1 votes 1 votes Manas Mishra commented Dec 26, 2018 reply Follow Share initially 2 4 8 12 13 14 15 time out new threshold = floor[15/2] = 7 1 2 4 7 8 , so congestion window after 12th transmission = 8+1 = 9 0 votes 0 votes Magma commented Dec 26, 2018 reply Follow Share Manas Mishra I think it take ceil (15/2) = ceil (7.5) = 8 0 votes 0 votes Shreya kumari commented Dec 27, 2018 reply Follow Share @Magma why we take ceil(7.5) can you please elaborate this. 0 votes 0 votes Please log in or register to add a comment.