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long, ayer o smaller packets and sends the packets into the netwo assembles the packets back into the original message. cess as message segmentation. Figure 1.27 illustrates rt of a message with and without message segmentatio e that is 8 106 bits long that is to be sent from source= re 1.27. Suppose each link in the figure is 2 Mbps. Ign g, and processing delays. sider sending the message from source to destination nentation. How long does it take to move the message to the first packet switch? Keeping in mind that each e-and-forward packet switching, what is the total time ssage from source host to destination host? y suppose that the message is segmented into 800 pack et being 10,000 bits long. How long does it take to m et from source host to the first switch? When the first from the first switch to the second switch, the second from the source host to the first switch. At what time et be fully received at the first switch? y long does it take to move the file from source host to when message segmentation is used? Compare this re wwer in part (a) and comment.

long, ayer o smaller packets and sends the packets into the netwo assembles the packets back into the original message. cess as message segmentation. Figure 1.27 illustrates rt of a message with and without message segmentatio e that is 8 106 bits long that is to be sent from source= re 1.27. Suppose each link in the figure is 2 Mbps. Ign g, and processing delays. sider sending the message from source to destination nentation. How long does it take to move the message to the first packet switch? Keeping in mind that each e-and-forward packet switching, what is the total time ssage from source host to destination host? y suppose that the message is segmented into 800 pack et being 10,000 bits long. How long does it take to m et from source host to the first switch? When the first from the first switch to the second switch, the second from the source host to the first switch. At what time et be fully received at the first switch? y long does it take to move the file from source host to when message segmentation is used? Compare this re wwer in part (a) and comment.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Networking & Data Communications 

In modern packet-switched networks, including the Internet, the source host segments long, application-layer messages (for example, an image or a music file) into smaller packets and sends the packets into the network. The receiver then reassembles the packets back into the original message. We refer to this process as message segmentation. Figure 1.27 illustrates the end-to-end transport of a message with and without message segmentation. Consider a message that is 8. 106 bits long that is to be sent from source to destination in Figure 1.27. Suppose each link in the figure is 2 Mbps. Ignore propagation, queuing, and processing delays. a. Consider sending the message from source to destination without message segmentation. How long does it take to move the message from the source host to the first packet switch? Keeping in mind that each switch uses store-and-forward packet switching, what is the total time to move the message from source host to destination host? b. Now suppose that the message is segmented into 800 packets, with each packet being 10,000 bits long. How long does it take to move the first packet from source host to the first switch? When the first packet is being sent from the first switch to the second switch, the second packet is being sent from the source host to the first switch. At what time will the second packet be fully received at the first switch? c. How long does it take to move the file from source host to destination host when message segmentation is used? Compare this result with your answer in part (a) and comment. Source Source Message Packet switch Packet Packet switch Packet switch Packet switch Destination Destination
Transcribed Image Text:In modern packet-switched networks, including the Internet, the source host segments long, application-layer messages (for example, an image or a music file) into smaller packets and sends the packets into the network. The receiver then reassembles the packets back into the original message. We refer to this process as message segmentation. Figure 1.27 illustrates the end-to-end transport of a message with and without message segmentation. Consider a message that is 8. 106 bits long that is to be sent from source to destination in Figure 1.27. Suppose each link in the figure is 2 Mbps. Ignore propagation, queuing, and processing delays. a. Consider sending the message from source to destination without message segmentation. How long does it take to move the message from the source host to the first packet switch? Keeping in mind that each switch uses store-and-forward packet switching, what is the total time to move the message from source host to destination host? b. Now suppose that the message is segmented into 800 packets, with each packet being 10,000 bits long. How long does it take to move the first packet from source host to the first switch? When the first packet is being sent from the first switch to the second switch, the second packet is being sent from the source host to the first switch. At what time will the second packet be fully received at the first switch? c. How long does it take to move the file from source host to destination host when message segmentation is used? Compare this result with your answer in part (a) and comment. Source Source Message Packet switch Packet Packet switch Packet switch Packet switch Destination Destination
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