The physical path through which the data or information travels between sources is called transmission media. We can say that transmission media act as a carrier between sender and receiver in order to send data. The base of transmission media is cabelling mechanism. It is also called guided media. Wired transmission media is of three types base on the type of wire/cable used to transmit data.
a) Twisted pair cable
b) Coaxial cable
c) Fiber optic cable
Wired channels are most popular and widley adopted transmission channel used to transmit data from one location to another.
1 Twisted pair cable.
Twisted pair cables are the most popular transmission media for transferring data on computer network. Crosstalk interference is reduced by twisting copper wire around each other, varies from 5cm to 15cm in length. There are two type of twisted pair cable that are shielded twisted pair and unshielded twisted pair cable.
2. Coaxial Cable.
A coaxial cable is atype of wire which is surrounded by insultor such as plastics. This kind of wire shielded and used for transmission of radio frequency, data and video. It is used for long distances and support more stations on a common line than twisted pair cable. It is common media for television network, local area network and long distance communication of telephone.
3.Fiber-optic cable.
A thin, flexible wire consists of glass fibers coated with insulated casing. Fiber optic cable is alsoknown as optical fiber in which data is transmitted in form of light beam. It is used in data networking and telecommunication. This contains two modes that are:Uni-mode, only one beam of light can be passed and Multimode, many beam of light are passed.
Core:The inner most section is the core, which serve as a light carrying device.
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