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Round Trip Delay

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For a 1-Gbps network operating over 5000 km, the delay is the limiting factor, not the bandwidth. Consider a MAN with the average source and destination 20 km apart. At what data rate does the round-trip delay due to the speed of light equal the transmission delay for a 1-KB packet? Assume the speed of light in fibre to be 2/3 the speed of light in a vacuum.

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Solution Preview

Speed of light = 3 x 10^5 km/s.

The round-trip delay is due to the propagation of the signal from the source to the destination and than back to the source (thus, round-trip). In this problem, the round-trip delay is assumed to travel through a fiber optic link at 2/3 the speed of light (2 x 10^5 km/s).

To calculate the round-trip delay, we first calculate the one-way delay and then multiply ...

Solution Summary

To calculate the round-trip delay, we first calculate the one-way delay. The full solution includes step-by-step details regarding where to proceed from there, as well as the final answer.

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