Which of the following statements are TRUE?
(S1) TCP handles both congestion and flow control $\Rightarrow$ True.
IT uses congestion window for congestion control & Advertisement window for flow control
(S2) UDP handles congestion but not flow control $\Rightarrow$ UDP does not handle
congestion but also not handle flow control.
(S3) Fast retransmit deals with congestion but not flow control$\Rightarrow$ Yes.
Fast Retransmit is technique for detecting out of Order Datagram & Sending it.
It is congestion control technique and has no relation with Flow control
(S4) Slow start mechanism deals with both congestion and flow control $\Rightarrow$ False.
It has nothing to do with Flow control. Flow control is taken care by Advertisement window.
Slow start is way Sender tries to gauge network capacity !
Answers : S1 and S3 only.
@ Moin Mukhtar
In fast retransmit whenever the sender gets 3 ack of same sequence number it can safely assume that that packet has been lost and it retransmits the packet without waiting for the time out.
Tcp handles both Congestion Control and Flow Control. For Flow Control it uses Sliding Window Protocol Algorithms and for Congestion Control it uses four congestion control algorithms: slow start, congestion avoidance, fast re-transmit, and fast recovery.
So Option (B)