Network-Layer
September 5, 2024Set-Theory
September 5, 2024Network-Layer
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Question 19
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Assume that source S and destination D are connected through two intermediate routers labeled R. Determine how many times each packet has to visit the network layer and the data link layer during a transmission from S to D.
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Network layer – 4 times and Data link layer – 4 times
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Network layer – 4 times and Data link layer – 3 times
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Network layer – 4 times and Data link layer – 6 times
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Network layer – 2 times and Data link layer – 6 times
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Question 19 Explanation:
From above given diagram, its early visible that packet will visit network layer 4 times, once at each node [S, R, R, D] and packet will visit Data Link layer 6 times. One time at S and one time at D, then two times for each intermediate router R as data link layer is used for link to link communication.
One at packet reaches R and goes up from physical –DL-Network and second time when packet coming out of router in order Network –DL-Physical.
Correct Answer: C
Question 19 Explanation:
From above given diagram, its early visible that packet will visit network layer 4 times, once at each node [S, R, R, D] and packet will visit Data Link layer 6 times. One time at S and one time at D, then two times for each intermediate router R as data link layer is used for link to link communication.
One at packet reaches R and goes up from physical –DL-Network and second time when packet coming out of router in order Network –DL-Physical.