Fiber & Dark Fiber

What is the difference between fiber and dark fiber?

 

 

While the fiber optic cables in lit fiber networks constantly have light pulses streaming through them and carrying data around, the cables in dark fiber networks don't have any light pulses passing through them and are sitting dormant for the most part.

Dark fiber is able to simultaneously carry multiple wavelengths, providing much higher bandwidth, lower latency and greater security. When leasing dark fiber, businesses have all the wavelengths of fiber-optic infrastructure at their disposal.