Transmitting Devices

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by Michael5290
Last updated 6 years ago

Computer Science

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Transmitting Devices



TransmittingDevicesMichael Nguyen

Cellular radio transmission is used by phones to transfer data by the means of transforming electromagnetic waves into radio waves. These radio waves are sent to hubs, routers, or servers to transfer data. The advantage of radio transmission is that it is very inexpensive. The disadvantage is that the connection to a network may be disrupted for many reasons, usually due to objects in the way or being too far out.

Satellite transmission uses the means of satellites. These satellites are usually located faw away from Earth, in the orbit of space. How these satellites transfer data is by recieving signals from a base on Earth. This signal reaches the satellite, and then is redirected to an area. This form of transmission is often used to provide Internet services for people. The advantage of this is that it is much faster, compared to DSL. The disadvantage is that these satellites can very expensive and may be difficult to launch and successfully be placed in Earth's orbit.

Microwave transmission uses the means of super high frequency radio waves to transfer data that is usually voice or audio. This type of transmission is used to transfer data and voice from ground-based stations to sattellites. The advantage of this transmission is that it has decent data rate. The disadvantage is that the microwaves are affected by any obstacle, requiring the antenneas used to built very high from the ground.

Coaxial cables are widely used by the cable television industry and in computers due to their advantage of being able to carry more data compared to ethernet and twisted-pair cables. The coaxial cable is insulated and surrounded by a braided wire to reduce electrical and radio frequency interference. The disadvantage of these cables is that they are very expensive

The ethernet cord is among one of the most popular LAN standards. The cable is widely used to connect network devices such as modems, routers, adaptors, etc. The advantage that ethernet cords offer is that they're cheap and have fast data transmission. The disadvantage of this cable is that it also limited to distance.

The twisted-pair cable is used among LAN connections. The cable consists of two wires that intertwine. The advantage of this is that it reduces crosstalk and electromagnetic induction. The cable is also very inexpensive. The disadvantage of this cable is that it is limited to distance.

Fiber-optic-cables are used for the Internet, with large fiber optic cables covered in insulated. These cables can be found under the sea ground. They are insulated because they're fragile, and are much more expensive than the three cables above. Although this may be true, fiber optic cables can carry more data than metal cables, are less likely to have interference than metal cables, and are lighter and thinner than metal cables. The cable itself uses the means of glass/plastic threads to transmit data. There are multiple threads within a fiber optic cable.

Wireless connections use the means of radio waves. There are no cables/wires involved besides the installation of the device like a router.

Wired connections uses cables/wires in order to connect to a network. In other words, a wired connection is directly connected.

Infrared transmission uses the means of either electromagnetic waves for short distance, or radio waves for longer distance. This form of transmission is usually utilized by remotes to devices, such as the remote to a cable box. The advantage of these is that they provide simple data transmission in a short range.The disadvantage is that infrared is affected by obstacles that may block the signal, and infrared is limited in distance also.


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