Fiber optic attenuation affects routers
If the signal is too weak, the receiver cannot read the information and you lose data. Fiber cladding consists of layers of lower-refractive index material in close contact with a core material of higher refractive index. It's measured in decibels per kilometer (dB/km), and it determines how far a signal can travel before it becomes too weak to read. Things like impurities in the fiber core and reflections at the core-cladding edge cause this drop.
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