Reference no: EM1367842
Make the assumption transmission is over a single link, so frames can't "jump over" each other in time.
a) Consider a go-back protocol with 3-bit sequence numbers and a window range of 7 frames. After sending frames numbered 0,1,2,3,4,5, the sender gets back the cumulative acknowledgment, "expecting 3". What frames are in the sender's window of allowed transmissions just after this event?
b) Consider a selective repeat protocol with a 4-bit sequence number and a window range of 8 frames. Suppose the state of the sender's window is frames 0,1,2,3,4,5,6,7, none acknowledged, and the sender has sent frames 0,1,2,3,4,5,6. Then the sender learns of acknowledgment of 0,1,2,5. What frames are in the sender's window range just after this event?
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