help3002

It's UWAweek 19 (1st semester, week 10)

help3002

This forum is provided to promote discussion amongst students enrolled in CITS3002 Computer Networks.

Please consider offering answers and suggestions to help other students! And if you fix a problem by following a suggestion here, it would be great if other interested students could see a short "Great, fixed it!" followup message. How do I ask a good question?

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project Question about UDP ACKs (both)

2:21pm Sat 27th Apr, ANONYMOUS

Hi Chris, Are we expected to implement UDP ACKs/NACKs, or do we assume that UDP packets will always arrive? It's never explicitly said if we have to, even though the project description does say that UDP is unreliable. Also, for the demo, do we have to show the servers communicating between different computers? On the project page it says "station servers will execute on one or more computers," but on the getting started page it says "Because our project runs on a single computer, all URLs refer to the hostname localhost." Obviously, if we're communicating between different computers, it would be necessary to have ACKs and NACKs, but I'm not sure if it's necessary for a localhost connection. Cheers

project Question about UDP ACKs (both)

5:01am Sun 28th Apr, Christopher M.

ANONYMOUS wrote:

> Are we expected to implement UDP ACKs/NACKs, or do we assume that UDP packets will always arrive? It's never explicitly said if we have to, even though the project description does say that UDP is unreliable.

When using UDP, its packets may be lost (though not corrupted, or incorrectly delivered). Your project will need to account for that possible loss.

> ... but on the getting started page it says "Because our project runs on a single computer, all URLs refer to the hostname localhost."

Sorry, that was badly worded. Your project will need to eventually execute on multiple computers. I've now corrected it to "This example runs on a single computer, so...."