Question

Consider the rdt 3.0 protocol. Draw a diagram showing that if the network connection between the sender and receiver can reorder messages (that is, that two messages propagating in the medium between the sender and receiver can be reordered). then the alternating-bit protocol will not work correctly (make sure you clearly identify the sense in which it will not work correctly). Your diagram should have the sender on the left and the receiver on the right, with the time axis running down the page, showing data (D) and acknowledgment (A) message exchange. Make sure you indicate the sequence number associated with any data or acknowledgment segment.

Answer 1

A diagram can be drawn to show how the reordering of messages can cause the alternating-bit protocol to not work correctly in the rdt 3.0 protocol.

Step-by-step explanation:

A diagram can be drawn to show how the reordering of messages can cause the alternating-bit protocol to not work correctly in the rdt 3.0 protocol. In the diagram, the sender is on the left and the receiver is on the right, with the time axis running down the page. The diagram should show the exchange of data (D) and acknowledgment (A) messages, indicating the sequence number associated with each segment.

When the network connection between the sender and receiver can reorder messages, it means that messages can arrive at the receiver out of order. In the alternating-bit protocol, the receiver expects to receive messages in sequential order based on the sequence numbers. However, if messages are reordered, the receiver may receive a later message before an earlier message, leading to incorrect processing and potentially retransmissions. This can disrupt the flow of data and lead to errors in the communication.

Overall, the diagram showing the reordering of messages can help visually represent the issue with the alternating-bit protocol in the presence of message reordering in the rdt 3.0 protocol.