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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Chapter 1 Solutions

EBK COMPUTER NETWORKING

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