Networking Media

If  you are on the Internet right now, then
     some networking method is connecting
     your  computer  to your Internet Service
     Provider (ISP) and subsequently the rest of
     the world's active Internet users J

However, not all networks are public, or linked to outside
computers; some networks are private and only need to communicate with other local computers.

Network media  is the actual path over which an electrical signal travels as it moves from one component to another.

Types of Network Media

Wire-Line Networks
A wire-line is a term that is associated with a terminal or network that uses metallic wire conductors or optical fibers of some size, composition and length for telecommunications.
Used media:
     1-Coaxial cables.
     2-Twisted pairs.
     3-Fiber optics.

1-Coaxial cable 

•It is a type of cable that has an inner conductor  surrounded by an insulating layer, surrounded by a tubular conducting shield. 

•It is used as a transmission line for radio frequency signals.

•Its applications include feeding lines connecting radio transmitter and  receivers with their antennas, computer network connections, and distributing cable television signals.

This type is commonly used in LAN

There are two types of coaxial cable(thin & thick)
Thin coaxial cable:
reaches a destination of 500 m ,then the sign will be disturbed. Thin coaxial cable :

reaches a destination of 158 m and then the sign will be disturbed

2-Twisted pair cable 

•Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company.

•To reduce cross talk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other.

•Each connection on twisted pair requires both wires.
3-Fiber optics

•Optical fiber is a flexible, transparent fiber made of high quality extruded glass (silica) or plastic, slightly thicker than a human hair. It can function as a waveguide, to transmit light between the two ends of the fiber.

•Power over Fiber(POF) optic cables can also work to deliver an electric current for low-power electric devices.

where they permit transmission over longer distances and at higher bandwidths than wire cables. Fibers are used instead of metal wires because signals travel along them with less loss and are also immune to electromagnetic interference