EBK COMPUTER NETWORKING
EBK COMPUTER NETWORKING
7th Edition
ISBN: 8220102955479
Author: Ross
Publisher: PEARSON
Expert Solution & Answer
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Chapter 1, Problem P5P

a.

Explanation of Solution

  • Cars propagate the tollbooths of length 75 km at a speed of 100km/hr and the tollbooth takes 12 seconds to service each car. There are 10 cars which take 12 × 10 = 120 seconds or 2 minutes to cross a tollbooth.
  • At first tollbooth, the propagation delay of the cars is 45 minutes and reaches the second tollbooth after 2 + 45 = 47 minutes.
  • The process repeats with second and third tollbooths and also takes 120 seconds or 2 minutes time for service.

Finally, the total propagation delay is calculated using following formula

thepropagationdelay= timetakenforserviceinfirsttollbooth+timetakento reachsecondtollbooth

b.

Explanation of Solution

  • Cars propagate the tollbooths of length 75 km at a speed of 100km/hr and the tollbooth takes 12 seconds to service each car. There are 8 cars which take 12 × 8 = 96 seconds to cross a tollbooth.
  • At first tollbooth, the propagation delay of the cars is 45 minutes and reaches the second tollbooth after 46 minutes and 36 seconds.
  • The process repeats with second and third tollbooths and also takes 96 seconds time for service.

Finally, the total propagation delay is calculated using following formula

thepropagationdelay= timetakenforserviceinfirsttollbooth+timetakento reachsecondtollbooth+</

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Assume that there is a shared connection (for example, an Ethernet bus) with a speed of 1 Mbps. How much time (in microseconds) is required to send a frame with a length of 1000 bits over this link?
Consider a client and a server connected through one router. Assume the router can start transmitting an incoming packet after receiving its first 0.6 Mbits instead of the whole packet. Suppose that the transmission rate of each link is 6 Mb/s and that the client transmits one packet with a size of 2 Mbits to the server. Assume the propagation, processing, and queuing delays are negligible. Answer the following questions (use up to 4 significant digits if needed; e.g., yy.xxxx): What is the end-to-end delay?3D seconds What is the end-to-end delay if there are 2 routers between the client and the server?= seconds

Chapter 1 Solutions

EBK COMPUTER NETWORKING

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