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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
In Go-back-N protocol, the values of $S_f$ (Send window, the first outstanding packet) $=3$, $S_n$ (Send window, the next packet to be send) $=7$, after receiving the packet with AckNo. $6$, the value of $S_n$ is ______
Solution
In Go-back-N protocol,
$S_f$ = first outstanding packet
$S_n$ = next packet to be sent
Given,
$S_f=3$
$S_n=7$
AckNo. $6$ means packets before $6$ are acknowledged.
So, $S_f$ becomes $6$.
But $S_n$ remains unchanged because next packet to be sent is still $7$.
Therefore,
$S_n=7$
So, correct option is:
$\boxed{(b)\ 7}$
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