TRANSMISSION MEDIA

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What Do You Mean By Transmission Media:

What Do You Mean By Transmission Media It describes the type of physical system used to carry a communication signal from one system to another. Examples of transmission media include twisted-pair cable, coaxial cable, and optical fibre cable.

CLASSIFICATION OF MEDIA TYPES:

CLASSIFICATION OF MEDIA TYPES Twisted Pair Coaxial Cable Fiber Optic

TWISTED PAIR CABLE:

TWISTED PAIR CABLE Twisted pair cabling is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of canceling out electromagnetic interference (EMI) from external sources. It was invented by Alexander Graham Bell.

Advantages of Twisted Pair:

Advantages of Twisted Pair Least Expensive Can transmit both analog and digital Most commonly used in Telephone networks.

Types of Twisted Pair Cable:

Types of Twisted Pair Cable Unshielded Twisted Pair Cable (UTP) Set of twisted pair of cables within a plastic sheet. Transmission rate of 10-100mbps. Very flexible and easy to work.

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Shielded Twisted Pair Cable (STP) Each pair of wire is in metallic shield. Good insulation qualities Installation is easy Not commonly used as compared to UTP

COAXIAL CABLE:

COAXIAL CABLE It is an electrical cable Invented by Oliver Heaviside in 1880. Used in Cable Television network Used for both analog and digital data transmission. Where A= outer plastic sheath B=woven copper sheath C=inner dielectric insulator D=copper core

Advantages of Coaxial Cable:

Advantages of Coaxial Cable Greater Bandwidth Lower Error Rates Used for both Analog and Digital data.

OPTIC FIBRE:

OPTIC FIBRE An optical fiber is a flexible, transparent fiber made of glass (silica) or plastic, slightly thicker than a human hair. It functions as a waveguide, or “light pipe”, to transmit light between the two ends of the fiber. Invented by Daniel Colladon in Paris in 1840s.

ADVANTAGES :

ADVANTAGES These have greater bandwidth than copper transmission lines. These are lighter, smaller in diameter and often less expensive than copper lines. Optical fibre have higher carrying capacity.

Differences Between:

Differences Between Twisted Pair Cable Coaxile Cable Optical fibre Bandwidth is low Its 1 Mhz Bandwidth is quite high Its 1 Ghz Bandwidth is very high. Cheapest Moderately costly Very costly Low Data Moderately High Data Rates High Data Rates

QUIZ:

QUIZ Q1) Who invented Twisted Pair Cable? a) Oliver Heaviside b) Alexander Graham bell c) Danial Colladon d) Jaques Babinet

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Q2) What is the transmission rate of Unshielded twisted pair cable? a) 10-100Mbps b) 20-200Mbps c) 5-75Mbps d) 15-150Mbps

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Q3) Which one among these is least expensive? a) Twisted Pair Cable b) Coaxile Cable c) Optical Fibre Cable

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Q4) In which year was the coaxile cable introduced? a) 1885 b) 1886 c) 1887 d) 1840

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Q5) Which one among these is non-flammable? a) Twisted Pair Cable b) Optical Fibre c) Coaxile Cable d) None of these

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