Consider the figure below. Answer the following questions: a. Assuming FIFO service

Chapter 7, Problem P18

(choose chapter or problem)

Consider the figure below. Answer the following questions: a. Assuming FIFO service, indicate the time at which packets 2 through 12each leave the queue. For each packet, what is the delay between itsarrival and the beginning of the slot in which it is transmitted? What is theaverage of this delay over all 12 packets?b. Now assume a priority service, and assume that odd-numbered packetsare high priority, and even-numbered packets are low priority. Indicatethe time at which packets 2 through 12 each leave the queue. For eachpacket, what is the delay between its arrival and the beginning of theslot in which it is transmitted? What is the average of this delay over all12 packets?c. Now assume round robin service. Assume that packets 1, 2, 3, 6, 11, and12 are from class 1, and packets 4, 5, 7, 8, 9, and 10 are from class 2. Indicatethe time at which packets 2 through 12 each leave the queue. Foreach packet, what is the delay between its arrival and its departure? Whatis the average delay over all 12 packets?d. Now assume weighted fair queueing (WFQ) service. Assume that oddnumberedpackets are from class 1, and even-numbered packets are fromclass 2. Class 1 has a WFQ weight of 2, while class 2 has a WFQ weightof 1. Note that it may not be possible to achieve an idealized WFQ scheduleas described in the text, so indicate why you have chosen the particularpacket to go into service at each time slot. For each packet what is thedelay between its arrival and its departure? What is the average delay overall 12 packets?e. What do you notice about the average delay in all four cases (FIFO, RR,priority, and WFQ)?