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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.
  • a)
    Network layer – 4 times and Data link layer – 4 times
  • b)
    Network layer – 4 times and Data link layer – 3 times
  • c)
    Network layer – 4 times and Data link layer – 6 times
  • d)
    Network layer – 2 times and Data link layer – 6 times
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Assume that source S and destination D are connected through two inter...
In this scenario, the packet has to visit the network layer twice.

The first visit to the network layer occurs at source S, where the packet is encapsulated with the necessary network layer information such as source and destination IP addresses.

Then, the packet is passed to the data link layer, where it is encapsulated with the necessary data link layer information such as source and destination MAC addresses.

The packet is then sent to the first intermediate router (R1). At R1, the packet is decapsulated at the data link layer to extract the network layer packet.

After processing at the network layer, the packet is again encapsulated at the network layer with the necessary routing information. It is then passed back down to the data link layer where it is encapsulated with the data link layer information.

The packet is then sent to the second intermediate router (R2). At R2, the packet is decapsulated at the data link layer to extract the network layer packet.

Finally, the packet arrives at the destination D. The packet is decapsulated at the data link layer to extract the network layer packet, and then processed at the network layer.

Therefore, the packet has to visit the network layer twice during the transmission from S to D.
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Assume that source S and destination D are connected through two inter...
Concept
The Routers only contains 3 layer that's the reason sometimes they also called as 3-layer switch.
The Router is a physical or virtual internetworking device that is designed to receive, analyze, and forward data packets between computer networks. A router examines a destination IP address of a given data packet, and it uses the headers and forwarding tables to decide the best way to transfer the packets.

At Intermediate Router R the packet will not go beyond the network layer. Hence Network layer will only be visited once at both the routers.
But the Data link layer will be visited twice.
Hence Network layer will be visited 4 times and the Data link layer will be visited 6 times (1 + 2 (at R) + 2 (at R) + 1 = 6 )
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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.a)Network layer – 4 times and Data link layer – 4 timesb)Network layer – 4 times and Data link layer – 3 timesc)Network layer – 4 times and Data link layer – 6 timesd)Network layer – 2 times and Data link layer – 6 timesCorrect answer is option 'C'. Can you explain this answer?
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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.a)Network layer – 4 times and Data link layer – 4 timesb)Network layer – 4 times and Data link layer – 3 timesc)Network layer – 4 times and Data link layer – 6 timesd)Network layer – 2 times and Data link layer – 6 timesCorrect answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about 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.a)Network layer – 4 times and Data link layer – 4 timesb)Network layer – 4 times and Data link layer – 3 timesc)Network layer – 4 times and Data link layer – 6 timesd)Network layer – 2 times and Data link layer – 6 timesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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.a)Network layer – 4 times and Data link layer – 4 timesb)Network layer – 4 times and Data link layer – 3 timesc)Network layer – 4 times and Data link layer – 6 timesd)Network layer – 2 times and Data link layer – 6 timesCorrect answer is option 'C'. Can you explain this answer?.
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