Transmission media is a communication channel that carries the information from the sender to the receiver. Data is transmitted through the electromagnetic signals. The main functionality of the transmission media is to carry the information in the form of bits through LAN(Local Area Network).
3. Carry information from source to
destination.
Located below the physical layer.
Usually free space , metallic cable or
fiber optic.
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6. Provide a channel from one device to
another.
Include twisted-pair cable, coaxial
cable, fiber-optic cable.
Directed and contained by physical
limits of the medium.
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8. Consists of two conductors.
If the two wire are parallel ,the effect on
unwanted signal is not the same in both
wires.
Two types : UTP & STP.
Fig -4: Twisted pair cable
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9. Carries signals of higher frequency
ranges.
Coax has central core conductor of solid
wire.
Enclosed in insulating sheath.
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Fig-5: Coaxial cable
10. Light travels In straight line.
Moving through a single uniform
substance.
Entering another substance of
different density change ray
direction.
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11. Transport electromagnetic waves without
using physical conductor.
Often referred to as wireless communication.
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Fig-6: Unguided media
12. Ranging from 3kHz &
1GHz.
Propagate in sky mode.
With low frequencies can
penetrate through walls.
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13. Ranges from 1GHz & 300GHz.
A pair of antenna can be aligned .
Repeaters are needed for long
distances.
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14. Ranges from 300GHz to 400GHz.
Used for short range communication.
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Fig-7: Infrared
