Coaxial cable,Waveguide
and Fibre optic cable is an example of bounded medium.
The physical channels
(the media) that carry data are of two types: bounded and unbounded. In a
bounded medium, the signals are confined to the medium and do not leave it
(except for smaller leakage amounts). A pair of wires, coaxial cable,
waveguide, and optical-fiber cable are examples of bounded media.
Coaxial cable, or coax
(pronounced /ˈkoʊ.æks/), is a type of electrical cable that has an inner
conductor surrounded by a tubular insulating layer, surrounded by a tubular
conducting shield. Many coaxial cables also have an insulating outer sheath or
jacket.
A waveguide is an
electromagnetic feed line used in microwave communications, broadcasting, and
radar installations. A waveguide consists of a rectangular or cylindrical metal
tube or pipe. The electromagnetic field propagates lengthwise. Waveguides are
most often used with horn antenna s and dish antenna s.
Fiber optics, or optical
fiber, refers to the medium and the technology associated with the transmission
of information as light pulses along a glass or plastic strand or fiber. A
fiber optic cable can contain a varying number of these glass fibers -- from a
few up to a couple hundred.