Question

Which fo the following statemetns 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. S3 and S4 only
• B. S1,S2, and S3 only
• C. S1, S3 and S4 only
• D. S1 and S3 anly

Answer 1

The correct option is C S1, S3 and S4 only

S1 is true because TCP has its congestion control and flow control mechanism.
UPD itself does note have any flow control or congestion control mechanism. Therefore S2 is false.
Fast retransmit and fast recovery are part of TCP congestion control algorithms. Therefore S3 is True.
In slow start algorithm we use congestion and advertised windows and these act as flow control windows.
The congestion windows flow control imposed by the sender while the advertised window is flow control imposed by receiver.
$\therefore S4$ is True.