In Go-Back-N protocol, only one timeout timer (for the oldest unACKed packet) is maintained at the...
In Go-Back-N protocol, only one timeout timer (for the oldest unACKed packet) is maintained at the sender. Can you explain why this is sufficient?
Homework Answers
Whenever we sent a packet we need to get acknowledgement . If every packet get acknowledgement then it is called independent acknowledgement and if n number of packets get single acknowledgement then it is called Cumulative acknowledgement.
IN GOBACK -N we consider the window size of reciever as 1. Due to this suppose we sent packets 0,1,2,3,4,5 and 0,1 is recieved but 2 is lost. Now if 2 is lost and since the window size of reciever is 1 it will discard packets 3,4,5 because it need packet 2 first. So due to this on sender side we have only one time out timer for oldest packet whose acknowledgement has not yet recieved. Because if time out timer of packet is 2 exceeds and no ack came then sender will send 2 along with 3 ,4 and 5 thinking that reciever might have discarded these packets .
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In Go-Back-N protocol, only one timeout timer (for the oldest
unACKed packet) is maintained at the...
1. After transmiting a batch of packets, when a timer expires (timeout event happens), a TCP...
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Consider a simplified actual TCP senderreceiver, described as follows: .Upon a loss (timeout or t...
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Consider a simplified actual TCP senderreceiver, described as follows: .Upon a loss (timeout or triple-duplicate ACKs), the sender o transmits the oldest unACKed packet (whose sequence number Base) o restarts the timer Upon receiving an ACK with a Sequence #y > Base. o it considers all packets with sequence numbers s y as ACKed (cumulative ACK) o Sets Base to the sequence number of the packet immediately after the packet whose sequence number is y o Restarts the timer ....
(a) A data link with a 1 Gigabits/sec capacity is used to transmit packets made up of 1400 bytes of data and 100 bytes of protocol control information. Each packet is acknowledged by a short frame of size 150 bytes. The propagation speed in the transmission medium is 200,000 km/sec. Consider the buffering and processing time in the nodes to be negligible. A node A communicates with a node B, with a distance between nodes A and B of 16...
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