Consider an instance of TCP 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 12 MSS. Assume that a time out occurs during the 7th transmission. The congestion window size at the end of 12th transmission is ______. (in MSS)
My question is, After reached to threshold, should we have to increase congestion window with 1MSS or with 2MSS.