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We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.
Correct answer is '32'. Can you explain this answer?
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Verified Answer
We have three stations P, Q, R connected in serial manner. P is connec...
First we have to calculate RTT.
RTT= Transmission period + 2*propagation delay
= (8192/3*109) +(8192/60 *106) + 2*(5*105/2*108)(15*103/2*108)
= 5.29 ms.
Number of packets to be sent =5.29 *60 Mbps =31.74≈32 packets.
RTT= Transmission period + 2*propagation delay
= (8192/3*109) +(8192/60 *106) + 2*(5*105/2*108)(15*103/2*108)
= 5.29 ms.
Number of packets to be sent =5.29 *60 Mbps =31.74≈32 packets.
Most Upvoted Answer
We have three stations P, Q, R connected in serial manner. P is connec...
Analysis of the network:
- Link P-Q: 3Gbps, 500Km
- Link Q-R: 60Mbps, 15Km
- Packet size: 1KB
- Sliding Window Size (SWS) = Receiver Window Size (RWS)
Calculating transmission time:
- Time taken to transmit 1 packet on P-Q link = Packet size / Link speed = 1KB / 3Gbps = 8 microseconds
- Time taken to transmit 1 packet on Q-R link = Packet size / Link speed = 1KB / 60Mbps = 133.33 microseconds
Calculating propagation delay:
- Propagation delay on P-Q link = Distance / (speed of light in fiber) = 500Km / (2 * 10^5 Km/s) = 2.5 milliseconds
- Propagation delay on Q-R link = 15Km / (2 * 10^5 Km/s) = 0.075 milliseconds
Calculating round-trip time (RTT):
- RTT = 2 * (Propagation delay on P-Q link + Propagation delay on Q-R link) = 2 * (2.5ms + 0.075ms) = 10.15 milliseconds
Calculating bandwidth-delay product (BDP):
- BDP = Bandwidth * RTT = 3Gbps * 10.15ms = 30.45Mb
Calculating optimal SWS:
- Optimal SWS = BDP / Packet size = 30.45Mb / 1KB = 30,450 packets
- As SWS should be a power of 2, the closest power of 2 to 30,450 is 2^15 = 32,768 packets
- Therefore, the optimal SWS packets that can be sent is 32.
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We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer?
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We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer?.
We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for We have three stations P, Q, R connected in serial manner. P is connected to Q through a 3Gbps fibre optic link and length is 500Km. Q is connected to R through 60Mbps link and length is 15Km.All the links are full duplex in nature. A file is sent from station A to C. Packet size is 1KB.We use sliding window protocol such that SWS=RWS. Find the optimal SWS packets.Correct answer is '32'. Can you explain this answer?.
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