This is resolved by introducing sequence number for acknowledgement also. Stop and Wait ARQ (Automatic Repeat Request)Ībove 3 problems are resolved by Stop and Wait ARQ (Automatic Repeat Request) that does both error control and flow control. Rule 2) After consuming packet acknowledgement need to be sent (Flow Control)ģ. Delayed Acknowledgement/Data: After timeout on sender side, a long delayed acknowledgement might be wrongly considered as acknowledgement of some other recent packet. Rule 1) Send acknowledgement after receiving and consuming of data packet. Rule 2) Send next packet only after receiving acknowledgement for previous. RoundTripTime ( RTT) = 2* Propagation Delay.Propagation Delay = (Distance between routers) / (Velocity of propagation) Propagation Delay: Amount of time taken by a packet to make a physical journey from one router to another router.Stop and Wait ARQ mainly implements Sliding Window Protocol concept with Window Size 1.It is used in Data Link and Transport Layers.Used in Connection-oriented communication.
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December 2022
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