You are employed as a network technician at ABC.com.
ABC.com is planning to replace their existing network cabling. ABC.com has requested that the
cabling be replaced with Fiber-optic cable.
Which of following options best describe the construction of Fiber-optic cables?

A.
Fiber-optic cable consists of a core made of solid copper surrounded by insulation.

B.
Fiber-optic cable consists of a very thin cylinder of glass, called the core, which encircled by a
concentric layer of glass, known as the cladding.

C.
Fiber-optic cable consists of two insulated strands of copper wire twisted around each other.

D.
Fiber-optic cable consists of two insulated strands of copper wire twisted around each other
with foil for shielding.