GATE | Gate IT 2008 | Question 66

Which of the following statements are TRUE?

(S1) TCP handles both congestion and flow control
(S2) UDP handles congestion but not flow control
(S3) Fast retransmit deals with congestion but not flow control
(S4) Slow start mechanism deals with both congestion and flow control

(A) S1, S2 and S3 only
(B) S1 and S3 only
(C) S3 and S4 only
(D) S1, S3 and S4 only


Answer: (B)

Explanation: 1: with the help of TCP window=>flow control and with the help of congestion window=> Congestion control
2: No field are there in UDP header to control flow or congestion
3: It is used by TCP to overcome the problem of out of order segments by re-transmission
4: Slow start, nothing to do with flow control

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