Optical Fiber Strand
In optical fiber transmission, light is expressed in nanometers.
The transceiver transmits at 850 nm, 1,310 nm, or 1,550 nm
Shorter-wavelength (850 nm) transceivers are less expensive
Longer-wavelength (1,310 or 1,550 nm) light travels farther for a given speed
For LAN fiber, 850 nm provides sufficient distance and dominates