Consider the following Figure. Assuming TCP Reno is the protocol experiencing th
ID: 3799675 • Letter: C
Question
Consider the following Figure. Assuming TCP Reno is the protocol experiencing the behavior shown below, answer the following questions.
Identify the intervals of time when TCP slow start is operating.
Identify the intervals of time when TCP congestion avoidance is operating.
After the 10th transmission round, is segment loss detected by a triple duplicate ACK or by a timeout?
After the 22nd transmission round, is segment loss detected by a triple duplicate ACK or by a timeout?
What is the value of ssthresh at the 15th transmission round?
What is the value of ssthresh at the 24th transmission round?
During what transmission round is the 90th segment sent?
Assuming a packet loss is detected after the 25th round by the receipt of a triple duplicate ACK, what will be the values of the congestion window size and of ssthresh?
7138 40 36 35 35 34 34 33 3233 32 O 35 30 24 23 25 ON20 15 10 1 2 1 2 3 4 5 6 7 8 9 101 11213141 51617181920212 223242526 TRANSMISSION ROUNDExplanation / Answer
1)/ the intervals of time when TCP slow start is operating at (1,6) and (23,26)
2)the intervals of time when TCP congestion avoidance is operating is occuring at the interval (6,16) and at interval (17,22),heree answer is given on the basis of assumption,assumimg tha the lost acknowledgement is arrived after three diffenent duplicate acknowledgemnet sent directly.
3)After the 10th transmission round, is segment loss detected by timeout because in 10th TR conjesation window size is deceased by one.
4).After the 22nd transmission round, is segment loss detected by timeout and the conjesation window is set to sizeone.
5).the value of ssthresh at the 15th transmission round is 25.
6).the value of ssthresh at the 24th transmission round is 23 but if a lost is detected then the value will be halved,and the ssthresh will be 12.
7)Assuming a packet loss is detected after the 25th round by the receipt of a triple duplicate ACK ,the thresh hold will be set to half the current value of the conjesation window,(24) and when the loss occured the conjesation window will be set to increase by 3 value of MSS ,THEREFORE the new thresh hold value of the congesation size of ssthresh will be 19 and 24.
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what is ssthresh?? slow start threshhold.The slow start algorithm can simplified as this: for every acknowledgment received, increase the CWND by one MSS(maximum segment ize)
what is conjesation?:Congestion, in the context of networks, refers to a network state where a node or link carries so much data that it may deteriorate network service quality, resulting in queuing delay, frame or data packet loss and the blocking of new connections
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