In Go-Back-N window, when the timer of the packet times out, several packets have to be resent even some may have arrived safe. Whereas in Selective Repeat window, the sender resends ___________

Networking - Quiz(MCQ)

All the packets

Packet which are not lost

Only those packets which are lost or corrupted

Correct Answer : Option (C) : Only those packets which are lost or corrupted

Explanation : In Selective Repeat, the sender side uses a searching algorithm to find the packets which need to be retransmitted based on the negative acknowledgements received and then resends only those packets thus saving bandwidth.

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Q .

EIGRP uses the ____________ algorithm for finding shortest path.

DUAL

SPF

Linkstat

Djikstra’s

Correct Answer : Option (A) : DUAL

Explanation : EIGRP uses the DUAL algorithm for finding shortest path. DUAL stands for diffusing update algorithm and it is used to prevent routing loops by recalculating routes globally.

Q .

Administrative distance for external EIGRP route is _______

100

170

135

190

Correct Answer : Option (B) : 170

Explanation : Routers use the metric of administrative distance to select the best path when there are different routes to the same destination from two different routing protocols as it is a measure of reliability of routing protocols. Administrative distance for external EIGRP is 170.