Suppose two hosts, A and B, are separated by 30,000 kilometers and are connected by a direct link of R = 3 Mbps. Suppose the propagation speed over the link is 2.5 x 108 meters/sec. a. Calculate the bandwidth-delay product, R _ dprop. b. Consider sending a file of 900,000 bits from Host A to Host B. Suppose the file is sent

Suppose two hosts, A and B, are separated by 30,000 kilometers and are connected by a direct link of R = 3 Mbps. Suppose the propagation speed over the link is 2.5 x 108 meters/sec. a. Calculate the bandwidth-delay product, R _ dprop. b. Consider sending a file of 900,000 bits from Host A to Host B. Suppose the file is sent

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.10: Exponential Queues In Series And Open Queuing Networks

Problem 8P

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suppose two hosts, A and B, are separated by 20,000 kilometers and are connected by a direct link of R = 2 Mbps. Suppose the propagation speed over the link is 2.5 x 108 meters/sec. 1. Calculate the bandwidth-delay product, R x dprop. 2. Consider sending a file of 800, 000 bits from Host A to Host B. Suppose the file is sent continuously as one large message. What is the maximum number of bits that will be in the link at any given time? 3. Provide an interpretation of the bandwidth-delay product?
Suppose Host A wants to send a large file to Host B. The path from Host A to Host B has three links, of rates R1=500 kbps, R2=2 Mbps, and R3=1 Mbps a. Assuming no other traffic in the network, what is the throughput for the file transfer? b. Suppose the file is 4 million bytes. Dividing the file size by the throughput, roughly how long will it take to transfer the file to Host B? c. Repeat (a) and (b), but now with R reduced to 100 kbps.
Suppose there are two links between a source and a destination. The first link has trans- mission rate 100 Mbps and the second link has transmission rate 10 Mbps. Assuming that the only traffic in the network comes from the source, what is the throughput for a large file transfer? A. 100 Mbps B. 10 Mbps C. 1 Gbps D. 110 Mbps
Suppose Host A wants to send a large file to Host B. The path from Host A to Host B has three links, of rates R1 = 12.8 Mbps, R2 = 4000 kbps, and R3 = 2 Mbps.a. Assuming no other traffic in the network, what is the throughput for the file transfer?b. Suppose the file is 12 million bytes. Dividing the file size by the throughput, roughly how long will it take to transfer the file to Host B?c. Repeat (a) and (b), but now with R2 reduced to 500 kbps.
Question 9 Suppose Host A wants to send a large file to Host B. The path from Host A to Host B has three links, of rates R1 = 1,024 kbps, R2 = 2,048 kbps, and R3 = 10 Mbps. Assuming no other traffic in the network, how long (in seconds) will it take to transfer a 50 KiB file? Disregard propagation, processing, and queuing delays. Full explain this question and text typing work only We should answer our question within 2 hours takes more time then we will reduce Rating Dont ignore this line
Calculate total time (in milliseconds) required to send a file of size of 8000 Bytes. Assume RTT (round trip time) of 80 milli second on a link with bandwidth of 0.8 x106bits /second and a packet size of 1000 Bytes where after sending each packet we must wait one RTT before sending the next packet.
Calculate total time (in milliseconds) required to send a file of size of 8000 Bytes. Assume RTT (round trip time) of 80 milli second on a link with bandwidth of 0.8 x106 bits /second and a packet size of 1000 Bytes where after sending each packet we must wait one RTT before sending the next packet.
The network referenced is shown in the picture below: Assume the network uses packet switching and 2 Kilobyte packets. Assume both L1 and L2 each have a propagation delay of 0.1 seconds. We are sending a 100 Kilobyte file. If L1 has infinite bandwidth, and L2 has a bandwidth of 1 Megabit (125 Kilobytes) per second, how long does it take to send the entire file? After the entire file is sent, a single acknowledgment is needed to say the file arrived, how long does the entire process take now (you can assume the ack has negligible size)? If a maximum of 10 packets can be sent per an RTT (this is the equivalent of a fixed window size of 10 packets), how long does it take to send the entire file? What if we start with a congestion window of 1 packet in slow start phase and no slow start threshold, How long to send the entire file now (Hint: This is similar to the previous question but with a variable window rather than fixed)? What if we start in congestion avoidance (linear growth)?
Don't give handwritten solution! : Suppose two hosts, A and B, are separated by 2,500 km and are connected by a link with a transmission rate of R=5M bps. The propagation delay is 2.9 * 108m/s. Calculate the time to send a 2Mbit file (assuming it is sent as one large message):
Calculate the total time (in milliseconds) required to send a file of size of 8000 Bytes. Assume one-way propagation delay of 40 milli second on a link with bandwidth of 0.8 x106 Bytes/second and a packet size of 1000 Bytes where data packets can be sent continuously with no packet loss.
Use again the network architecture provided in the figure above, were Rs, Rc and Ri for i = {1,2,3,4}, the transmission rates of the server link, client link and intermediate network links. Consider a message that is 60 · 106 bits long that is to be sent from client to server. Ignore propagation, queuing, and processing delays. c.How long does it take to move the file from source host to destination host when message segmentation is used and both path R1, R2 and path R3, R4 are used? How many packages should be routed from path R1, R2 and how many from path R3, R4 in order to maximize the use of the network? d.What is the end to end throughput if path R1, R2 is used, and what if path R3, R4 is used? What is the total throughput from client to server (if both paths are being used at the same time)?
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