Packets from many machines traverse the Internet at the same time. It saves time. It saves money. None of them 9. It can be installed similar to any cable, because it is flexible.
Light can travel through it, because the fiber is made from glass.
The light intensity does not diminish much as it travels along, because the fiber is constructed to reflect light back inside. All of the above. Sense pulses of light and turn them back into data. None of a and b. 12. By adding one additional router.