1ns = 27.94 cm in copper (speed of light)
1km = 100,000 cm
=> 1km of copper line without interruption needs 3579ns for packet to travel from one end to the other
1000km of copper line needs 3.579ms
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"The Master has no mind of her own.
She understands the mind of the people.
To those who are good she treats as good.
To those who aren't good she also treats as good.
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Yet she treats them all as her children." - Lao Tzu (老子)
