Advantages and disadvantages of all different types guided media
Answers
Advantages:
1.Higher bandwidth
2.Immunity to electromagnetic interference
3.Resistance to corrosive materials
4.Lightweight
5.Less signal attenuation.
Disadvantages:
1.More difficult installation
2.Very costly
3.Bending is not easy
4.Limited in distance
Guided transmission media are more commonly known as the wired communication or bounded transmission media. The electromagnetic signals travel between the communicating devices through a physical medium/conductor. As the medium for transmission is a physical conductor, it also provides direction to the signal. But there are physical limitations of the conductor in the guided media. Like the length of the conductor, its installation cost, its maintenance, etc.
The twisted pair cable has two conductors wires wounded around each other and each surrounded by an insulating material.
he coaxial cable has a central core conductor (usually copper) enclosed in an insulating sheath, which is further encased in an outer metallic braid, it serves as both protection against noise and as a second conductor which completes the circuit.
The optical fibre which is made of glass or plastic, and it transmits signals in the form of light. The optical fibre is noise resistance, has less signal attenuation and has a higher bandwidth in comparison to twisted pair cable and coaxial cable.
The unguided media is also called wireless communication. It does not require any physical medium to transmit electromagnetic signals. In unguided media, the electromagnetic signals are broadcasted through air to everyone. These signals are available to one who has the device capable of receiving those signal.
The unguided media is also called unbounded media as it does not have any border limitation. The unguided media allows the user to connect all the time, as the communication is wireless the user can connect himself from anywhere to the network.
The radio waves are generated easily; they are low-frequency signalsand can travel a long distance. The radio waves can penetrate through the buildings.
The microwaves are transmitted in a straight line and hence require the line-of-sight transmission. The distance covered by the microwave signal depend on the height of the two antenna. More the taller are antennas longer is the distance covered by the signal.
Infrared waves are used for short range communication. Like, the remote control for televisions, VCRs, etc. uses infrared waves. It can not penetrate through obstacles.