COMMUNICATION MEDIA-OPTICAL FIBRE CABLE

OPTICAL FIBRE


An  is a glass fiber. It uses pulses of light to transmit data. Some advantages of optical fibers over metal wires are less transmission loss, immunity from electromagnetic radiation, and very fast transmission speed, up to trillions of bits per second. One can use different colors of lights to increase the number of messages being sent over a fiber optic cable.It is very much fast and accurate working cable used widely in the computer networking enviroment.

COMMUNICATION MEDIA-COAXIAL CABLE

COAXIAL CABLE 
ITis widely used for cable television systems, office buildings, and other work-sites for local area networks. The cables consist of copper or aluminum wire surrounded by an insulating layer (typically a flexible material with a high dielectric constant), which itself is surrounded by a conductive layer. The insulation helps minimize interference and distortion. Transmission speed ranges from 200 million bits per second to more than 500 million bits per second.It is very successful and very much useful wired communication media for the proper and nice performance of a computer network,
ITU-T G.hn technology uses existing home wiring (coaxial cable, phone lines and power lines) to create a high-speed of up to 1Gigabits /s

COMMUNICATION-MEDIA-WELCOMEITBOOK

COMMUNICATION MEDIA
It plays very important role in computer network

Computer networks can be classified according to the hardware and associated software technology that is used to interconnect the individual devices in the network, such as electrical cable (HomePNA, power line communication), optical fiber, and radio waves(wireless LAN).Level 2 of OSI model represents it.

A well-known family of communication media is collectively known as Ethernet. It is defined and used by  various standards and media that enable communication between devices. Wireless LAN technology is designed to connect devices without wiring. These devices use radio waves or infrared signals as a transmission medium.

MEDIA IS TWO TYPES

1.WIRED TECHNOLOGY

2.WIRELESS TECHNOLOGY

WIRED TECHNOLOGY

4 TYPES OF TECHNOLOGY ARE BEING IN  USE TODAY

 1.TWISTED PAIR CABLE

2.COAXIAL CABLE

3.ITU-T G.hn

4.OPTICAL FIBER

TWISTED PAIR CABLE

IT is the most widely used medium for telecommunication. Twisted-pair cabling consist of copper wires that are twisted into pairs. Ordinary telephone wires consist of two insulated copper wires twisted into pairs. Computer networking cabling (wired Ethernet as defined by IEEE 802.3) consists of 4 pairs of copper cabling that can be utilized for both voice and data transmission. The use of two wires twisted together helps to reduce crosstalk and electromagnetic induction.It is very much famous and very much useful wired media for good and successful working of computer networking, The transmission speed ranges from 2 million bits per second to 10 billion bits per second. Twisted pair cabling comes in two forms: unshielded twisted pair (UTP) and shielded twisted-pair (STP). Each form comes in several category ratings, designed for use in various scenarios.