Saturday, December 7, 2013

Transmission Media

INTRODUCTION TO TRANSMISSION MEDIA The basic functions of media atomic bout 18 to carry a flow of information, in the form of bits and bytes, through and through a LAN. Ne 2rking media atomic number 18 considered Layer 1 components of LANs. You tolerate build computer networks with galore(postnominal) different media types. Each media has advantages and disadvantages. perverted Pair: A reprobate pair consists of two insulated hog wires, typic whollyy about 1 mm thick. The wire is depraved together in a helical form estimable like a desoxyribonucleic acid Molecule. Twisting is done because two parallel wires constitute a fine antenna. When the wires atomic number 18 reprobate, the waves from different twists cancel out, so the wires smoothen little effectively. Twisted pair can be utilize for transfer either analog or digital manifestations. The bandwidth depends upon burdensomeness of wires and the remoteness traveled, but several(prenominal ) megabits per seconds can be achieved for a fewer kilometers in many cases. Twisted pair cabling comes in several varieties, two of which are important for computer network. kinfolk 3 twisted pair consists of two insulated wires gently twisted together. quartette such wires are typically grouped in a plastic sheath to protect the wires and keep them together.
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The more(prenominal) advanced family line 5 twisted pair lead more twists per curium which results in less crosstalk and meliorate quality signal over long distances making them more suitable for heights speed computer communication. 11 Application: The to the highest de! gree frequent application of twisted pair is the telephone system. approximately all telephones are connected to telephone company berth by a twisted pair. Twisted pair can chip several kilometers without amplification but for longer distances repeaters are needed. concentric Cable: Coaxial cable has better shield than twisted pair, so it can span far distances at higher(prenominal) speeds. Two kind of coaxial cable are astray apply. One kind, 50 ohm cable is commonly used when it is think for digital transmission from the start. The...If you want to get a ample essay, order it on our website: OrderCustomPaper.com

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