Determine the window positions for succession of events, Computer Networking

Two neighbouring nodes (A and B) use a Go-Back-N protocol with a 3-bit sequence number and a window size of 4. Acknowledgments are cumulative. Assuming A is transmitting and B is receiving, in the figure below show the window positions for the following succession of events:

a)  after A sends frames 0, 1, 2, 3 and before any acknowledgments from B are received

b)  after A sends all new frames it is allowed to send following a successful reception of acknowledgment to frame 1

c)  just after acknowledgment to frame 2 arrives (but before any more frames are sent) Use diagonal crosses to show sequence numbers of packets sent but not yet acknowledged, and circles to show sequence numbers of packets node A is allowed to send

2054_Determine the Window Positions for Succession of Events.png

Posted Date: 3/25/2013 6:21:46 AM | Location : United States







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