Transmitting devices

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by averyathomp75
Last updated 7 years ago

Computer Science

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Transmitting devices

Twisted-Pair Cable

A twisted-pair cable is a cable that has two independent wires twisted around each other. The wires are twisted to reduce crosstalk and electromagnetic induction. An example of technology using twisted-pair cables are old telephones.Pro: Twisted pair cables are very cheap.Cons: Twisted Pair cables have limited bandwidth.


Ethernet is the most widely-installed LAN (Local Area Network). It was from by a modification to Alohanet by Xerox, DEC, and Intel. The most common Ethernet system is called 10BASE-T, and it has transmission speeds of 10 Mbps.Pro: Cost about $10-$20 for adapter.Con: Requires cabling.

A coaxial cable is a copper cable used by cable television companies between community antennas and user homes and businesses. Sometimes coaxial cables are used by telephone companies. The coaxial cable was invented in 1880 by a man named Oliver Heaviside. AT'T used the first cross-continental coaxial transmission in 1940.Pro: Coaxial cables can hook up to multiple devices.Con: The more devices there are on the cable the less clear the signal is.

Coaxial Cable

Fiber-optic lines are strands of pure glass that carry digital information over long distances.Fiber-optic cables are used in telephones and TV and sometimes even the internet.Pro: The signal is reliable.Con: Fiber optic cables cannot be bent too much or else they will not work correctly.

Fiber-Optic Lines

Radio Waves

Radio waves are essential for mobile communications. Radio waves transmit things at the speed of light. Mobile phones use radio waves.Pro: Travels long distances.Con: Takes a while for things to be transferred back.


Microwave transmissions depend on weather conditions and the frequency it is using. Microwaves have high transmission frequencies and cannot go through walls.Pro: Microwaves are mobile.Con: You have to share bandwidth.


A satellite is anything that orbits something else. A satellite is a specialized wireless receiver that is launched by a rocket to orbit the Earth. The first artificial satellite was launched by Russia and it was about the size of a basketball.Pro: Satellites are very accurate.Con: Tall buildings and forests can block the signal.

Transmitting Devices

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By: Avery Thompson


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