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 : 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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EIGRP uses the ____________ algorithm for finding shortest path.

DUAL

SPF

Linkstat

Djikstraâ€™s

Correct Answer : 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.

Administrative distance for external EIGRP route is _______

100

170

135

190

Correct Answer : 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.

For default gateway, which of following commands will you use on a Cisco router?

Default network

IP default route

IP default network

IP default gateway

Correct Answer : IP default network

Explanation : IP default network command is used to find the default gateway in Cisco router. If the router finds routes to the node, it considers the routes to that node for installation as the gateway to it.