Free Network basics lessonsNetwork basics · Stage 0 · How data travels · Step 2
Delay and throughput
Break the time a packet takes into transmission, propagation and queuing, and see which one matters when. About 14 minutes.
A packet crosses a 100 km link. Which change reduces its propagation delay?
- AMaking the link shorter
- BUsing a faster link rate
- CUsing a smaller packet
Show the answer
Making the link shorter. Propagation delay is distance divided by signal speed, and doesn't depend on the rate.
4 questions on this idea
Short questions that apply the idea to new cases: trace it, work out a number, put steps in order. A wrong answer explains itself.
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