Pattern of transmissions and associated state transitions
Consider a bidirectional link that uses Go-Back-N with N = 7. Suppose that all frames are one unit long andthat they use a time-out value of 2. Assume the propagation is 0.5 unit and the processing time is negligible.
Assume the ACK timer is one-unit long. Assuming stations A and B begin with their sequence numbers set to zero, show the pattern of transmissions and associated state transitions for the following sequences of events:
a. Station A sends six frames in a row, starting at t = 0. All frames are received correctly.
b. Station A sends six frame in a row, starting at t = 0. All frames are received correctly, except frame 3 is lost.
c. Station A sends six frames in a row, starting at t = 0. Station B sends six frames in a row starting at t = 0.25. All frames are received correctly.
