Distinguish Waiting Time from Transfer Time

Supplied materials

• Paper and pencil; answers may also be spoken or typed.
• All cases, labels, numbers and rules are supplied on this page. No real account, private information or purchase is needed.

Learn the idea

Total wait in a simplified network request can include a fixed starting delay and the time spent transferring data. Reducing one part does not erase the other. The supplied model lists both parts in seconds. Add them only because they measure time in the same request.

Add the starting delay to the stated transfer time to estimate total wait. Do not report only transfer time when the model includes an additional delay.

Use this supplied case: Model request: starting delay 2 seconds, followed by transfer lasting 4 seconds. Total wait? Use the details in this example. Say which detail helped you choose. This pretend example does not tell us how every real system works.

1. Follow the worked example one step at a time. Say or draw what happens.
2. Add the starting delay to the stated transfer time to estimate total wait.
3. Say which detail makes the example answer fit. Pick another answer and say why it does not fit.
4. Try the question and practice questions. Read the rule again if your answer does not match the explanation.

Check your reasoning

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Take it further

New request waits 3 seconds then transfers for 9 seconds. Expected:12 seconds total. Removing delay reduces it to 9, not 0.

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