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In the slow start phase of the TCP congestion algorithm, the size of the congestion window:

1. does not increase

2. increase linearly

4. increases exponentially

### 1 comment

In Slow start phase, window size increases by 1 MSS for each received acknowledgement and at the end of RTT, window size increases exponentially.
So, (D) is correct option!

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Assume that $\text{ssthresh} = 8.$

Increase is exponential in the Slow Start Phase.

### 1 comment

1*2 = 2

2*2 = 4

4*2 = 8 , why don't we read it as linear growth?
In slow start cwind size increases exponentially & In Congestion avoidance cwind size increases Linearly.
Option D is correct, Increases exponentially.
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