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Category > Management Posted 17 Jan 2018 My Price 8.00

Go-back-N protocol

Answer the following questions related to the FSMs for the Go-back-N protocol with m = 6 bits. Assume the window size is 63. (Figure 23.27):

 

a. The sending machine is in the ready state with Sf  = 10 and Sn = 15. What is the sequence number of the next packet to send?

b. The sending machine is in the ready state with Sf  = 10 and Sn = 15. A time-out occurs. How many packets are to be resent? What are their sequence numbers?

c. The sending machine is in the ready state with Sf = 10 and Sn = 15. An ACK with ackNo = 13 arrives. What are the next values of Sf  and Sn?

d. The sending machine is in the blocking state with Sf = 14 and Sn = 21. What is the size of the window?

e. The sending machine is in the blocking state with Sf  = 14 and Sn = 21. An ACK with ackNo = 18 arrives. What are the next values of Sf  and Sn? What is the state of the sending machine?

f. The receiving machine is in the ready state with Rn = 16. A packet with sequence number 16 arrives. What is the next value of Rn? What is the response of the machine to this event?

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Maurice Tutor
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Status NEW Posted 17 Jan 2018 10:01 PM My Price 8.00

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