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Can Anyone Explain Different Transmission Media Use In Local Area Network?

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Amen Bukhari Profile
Amen Bukhari answered
Local Area Networks (LAN) is a private network or with in a single building. For transmitting data over Local Area Network (LAN) single cable is used and all Computers are attached by single cable. Local Area Network (LAN) mostly comes into two categories. These categories are cable network and wireless network. Cable network consists of three types of cables twisted pair cable, coaxial cable and fiber optics.

Twisted pair cable consists of pairs of copper wire twisted together. 4 to 300 twisted pairs are bundled in a group. In Local Area Network (LAN) 25 pairs is a standard. The standard used in industry is known as 10 bas T, which tracks information transmission at 10 Megabits per seconds. There are two types of twisted pair cable; shielded twisted pair and unshielded twisted pair cable.

Coaxial cable consists of single central wire that is surrounded by insulation. This cable is similar to television cable. Mostly it is used to connect computer placed 100 meters distance from each other. fiber optics is the latest. Fiber optics consists of hundreds of twisted pair of copper wire. Fiber optics has so many advantages over other two types. The only drawback of fiber optics is that it is costly.
chidu kittad Profile
chidu kittad answered
Transmission media means a media which is  used to transmit the  data from one device to another device by  connecting to each other in the networking. There are two types of media's are used to transmit the data from one host to another host, one is wired media and another one is wireless media. In wired media different types cable are used to connect the devices in the network for transmitting the data or to communicating with each other. There are three types of wired media's, Twisted pair  cable it again divided in two parts Shielded twisted pair and Unshielded twisted paire, this cable is used in LAN connecting systems to another system. Fiber optical cable and co- axial cable.
In wireless networking any  physical cables not using there some infrared waves and RF signals are used to send data from one device.
Shumaela Rana Profile
Shumaela Rana answered
Transmission medium is the physical path linking two communication devices. Let me explain here few of the transmission media used in local area networks.
An open wire media is usually described as an electrical wire that is strung up along the power poles. There is no facility of shielding is provided in this media so noise interferences while communication can not be avoided. So in simple words we can say that it is a path for data signal without any protection from noise interruptions. So this type of media is at risk to a great extent to noise interferences and it is not a good practice to use it for data transmission for more than 20 ft.
Twisted pair (guided media) in which cables is twisted together in pairs. Each pair consists of a wire for a positive data signal and another wire for negative data signal. The level of noise interference reduction can be determined particularly by the number of turns used per foot. They are inversely proportion to each other.
Another guided media is coaxial cable that consists of two conductors. The outstanding control of the electric resistance characteristics of the cable permit higher data rates to be transferred than twisted pair cable.

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