Consider an instance of TCPs Additive Increase Multiplicative Decrease(AIMD) algorithm where the window size at the start of the slow start phase is 2 MSS and the threshold at the start of the first transmission is 8 MSS. Assume that a time out occurs during the fifth transmission. Find the congestion window size at the end of the tenth transmission.I am bit confuse in this concept.What I know :  Slow start and congestion avoidance are different.Slow start is used in conjunction with congestion avoidance.   Window size for 1st transmission = 2 MSSWindow size for 2nd transmission = 4 MSSWindow size for 3rd transmission = 8 MSS threshold reached, increase linearly (according to AIMD)Window size for 4th transmission = ?? MSS Window size for 5th transmission = ?? MSStime out occurs, resend 5th with window size reduced to half (according to AIMD)Window size for 5th transmission =  ??? MSS  What will be the Window size for 4th transmission ? 9 MSS or 10 MSSIt means i want to ask you after threshold window size should increase linearly means it  should increase by 1 MSS or 2 MSS  ( 2 MSS is given in example ) ?  What will be window size for 5th transmission ? Will it be 1 MSS or 2 MSS ?   Please clear my concept. I am so confused. 
TCP congestion problem
computer networks