Alternating Bit Protocol

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Questão 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?

If the right host receives D(1,x), it will ignore the frame and reply with C(OK0).

If the left host receives C(OK,1), it will retransmit the frame D(1,x).

If the right host receives D(0,x), it will accept the frame and reply with C(OK0).

Questão 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?

Questão 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 ?

Autores	Olivier Bonaventure
Prazo de entrega	Sem prazo
Limite de submissão	No limitation
Category tags	reliable

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