In computer network system there are four types of unguided media infrared wave, Microwave wave, radio wave and Satellite Network or internet.
Unguided Media
Infrared | Microwave | radio wave | Satellite Network (Internet)
"For transmit data between two or more nodes we are using medium which is no physically exist"that is called unguided media. In LAN or MAN networking system cabal are very effective but for the world wide we are not able to connect those networking elements with cabal (guided media). Unguided media are able to transfer data form one place to another place using electromagnetic wave only(wireless).
Wireless media can be of different types
- Infrared Wave
- Radio Wave
- Microwave wave
- Satellite Network or Internet
This all four types of wireless media are differentiate according to its wave frequency.
- Infrared Wave
- Radio Wave
- Microwave wave
- Satellite Network or Internet
Infrared Wave
The electromagnetic waves which are in the range of 300 GHz (Gigahertz) to THz (Terahertz), are called infrared waves. This wave is used LED(Light Emitting Diode) or ILD(Interjection Laser Diode) to transmit signals in wireless media at a short distance. It can only affect the system located in one room, but it can not affect any system located in the another room.
For example using this infrared wave we are able to change TV channels using remote. This wave are used in TV, VCR, Computer(remote mouse or keyboard), music system, night vision camera etc.
For example using this infrared wave we are able to change TV channels using remote. This wave are used in TV, VCR, Computer(remote mouse or keyboard), music system, night vision camera etc.
Radio Wave
Although there is no limit on the wave of radio wave waves and microwaves, the frequency of all electromagnetic waves is between 3 KHz to 1 GHz, called radio waves. In the radio wave system we are used ommni-directional antenna to send or received data.
The biggest disadvantages of this system its effected by the whether or the others wave in wind, so the chance of signal bounds are increase. We are used AM or FM radio, television, cordless phone etc because of the radio wave signal.
Sending data from the earth to the satellite via transmitter is known as the up-link, and from satellite to the earth via transponser s called down-link. In different orbits we see three types of satellite travel
Geostationary Earth Orbit : All satellites that are considered to be almost equal to the speed of the Earth and from the Earth's surface, these satellites, which seem to be statistically clear, are called Geostationary satellites. For this reason, these satellites are placed 36 thousand kilometers away from the Earth's surface to the equator. To cover the whole world, 3 to 4 satellites are needed.
Middle Earth Orbit : Middle Earth Orbit satellites are placed 18 thousand kilometers away from the Earth's surface. This system is made up of 24 satellites and circulates the Earth in 6 orbits. GPS (Global Positioning System) is the big example of this system.
Low Earth Orbit : Low Earth Orbit satellites are placed in the pole chamber. these satellites are placed one thousand kilometers away from the Earth's surface.
Thanks for watching.
➥ Write a sort note on Unguided Media.
➥ What are the types of Unguided Media ?
➥ What are Infrared wave, radio wave and microwave wave ?
➥ Write a sort note on Satellite Internet or Network ?
To know more on different topic of COMPUTER visit dhide.blogspot.com
The biggest disadvantages of this system its effected by the whether or the others wave in wind, so the chance of signal bounds are increase. We are used AM or FM radio, television, cordless phone etc because of the radio wave signal.
Microwave Wave
The electromagnetic waves which are in the range of 1 GHz (Gigahertz) to 300 GHz (Terahertz), are called Microwave Waves. Because of the high frequencies it's are not able to bend, so it's always go through the straight line. This system are not using ommnidirectional it's used unidirectional to transmit data.Satellite Network / Internet
Because of the earth surface is oval that's why the signal can't be possible to transfer between two device among long distance. It requires a medium that will be very high and thereby communicate the information from one place to another.Sending data from the earth to the satellite via transmitter is known as the up-link, and from satellite to the earth via transponser s called down-link. In different orbits we see three types of satellite travel
- Geostationary Earth Orbit (GEO)
- Middle Earth Orbit (MEO)
- Low Earth Orbit (LEO)
Geostationary Earth Orbit : All satellites that are considered to be almost equal to the speed of the Earth and from the Earth's surface, these satellites, which seem to be statistically clear, are called Geostationary satellites. For this reason, these satellites are placed 36 thousand kilometers away from the Earth's surface to the equator. To cover the whole world, 3 to 4 satellites are needed.
Middle Earth Orbit : Middle Earth Orbit satellites are placed 18 thousand kilometers away from the Earth's surface. This system is made up of 24 satellites and circulates the Earth in 6 orbits. GPS (Global Positioning System) is the big example of this system.
Low Earth Orbit : Low Earth Orbit satellites are placed in the pole chamber. these satellites are placed one thousand kilometers away from the Earth's surface.
Thanks for watching.
Unguided Media Vs Guided Media
- Unguided media are based on the microwave signal but guided media are based on mainly cable(twisted, coaxial, fiber optic etc.).
- Unguided Media's are don't have any physical present but guided media's have some physical present.
 |
| Unguided Vs Guided |
Question Covered
➥ What are the types of Unguided Media ?
➥ What are Infrared wave, radio wave and microwave wave ?
➥ Write a sort note on Satellite Internet or Network ?
To know more on different topic of COMPUTER visit dhide.blogspot.com
Post a Comment