Question

in copper cabling pairs of wire are twisted to:
a. convert signals to light pulses
b. protect against crosstalk
c. allow faster data transmission
d.all of the above

Answer 1

D.

The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.