Author(s) Olivier Bonaventure
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Alternating Bit Protocol

Question 1: Alternating Bit Protocol

After having correctly transmitted several frames, a host sends a data frame that is correctly acknowledged. This corresponds to the situation shown in the figure below:


At this stage of the transfer, which of the following proposals is true?

Question 2:

Consider a host on the left that needs to transmit 2 data frames to the right host. Among the following time sequence diagrams, which is the one that corresponds to a successful transmission of these two frames?

Question 3: Sending the same information twice

Sometimes, a host needs to send the same information twice. Consider a host that sends d followed by d. What is the correct time sequence diagram for this scenario ?