Propagation Speed and Delay
Optical cables transfer data at the speed of light in glass (slower than vacuum). This is typically around 180,000 to 200,000 km/s, resulting in 5.0 to 5.5 microseconds of latency per km. Thus the round-trip delay time for 1000 km is around 11 ms.
Read more about this topic: Optical Fiber Cable
Famous quotes containing the words speed and/or delay:
“No speed of wind or water rushing by
But you have speed far greater.”
—Robert Frost (1874–1963)
“Face troubles from their birth, for ‘tis too late to cure
When long delay has given the evil strength.
Haste then; postpone not to the coming hour: tomorrow
He’ll be less ready who’s not ready now.”
—Ovid (Publius Ovidius Naso)