help3002

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help3002

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UWA week 12 (1st semester, week 4) ↓

implementation of piggybacking (both)

3:16pm Mon 18th Mar, Christopher M.

ANONYMOUS wrote:

> Hello, I have a question regarding the piggybacking modification. When the the receiver node has to send its own data does it follow the same implementation of the stopandwaitprotocol?

Yes - both 'ends' need to support the sending of their own data, receiving data from the other end, receiving acknowledgements (of your data) from the other end, and sending acknowledgements (about the data from the other end). We term this a bi-directional protocol, where both ends perform exactly the same functions. Each end acts as both a sender and a receiver. In cnet, you only need to write the 'enhanced' stop-and-wait code once to support piggybacking. Each node will run the same code, reading and writing its own copy of any variables.

> In that case in my stopandwait protocol i have to also identify if its the requested data that is being sent from receiving node?

I'm afraid I don't understand your question; hopefully it was answered, above.