The Computer Revolution/Networks/Four Types of Wireless Communications


 * 1) Infrared Wireless Transmission- "Tranmission of data signals using infrared-light waves"(williams/sayer,2007) These infrared-light waves are at a frequency too low for human eyes to receive and interpret. Infrared ports can be found in digital cameras, laptops, and printers as well as wireless mice.
 * 'Advantages'
 * no cords
 * 'Disavantages'
 * Line-of-sight communication is required-there must be an unobstructed view between transmitter and receiver
 * 'Examples'
 * http://www.computer-accessories.biz/mouse/wireless_mouse.htm

A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications.
 * 1) Broadcast Radio- a wireless transmission medium that sends data over long distances (regions, states, countries) at up to 2 megabits per second (AM/FM Radio)
 * 2) Microwave Radio- Transmission of voice and data through the atmosphere as super high-frequency radio waves called microwaves. These frequencies are used to transmit messages between ground-based stations and satellite communications systems. (Williams & Sawyer, 2007).
 * 3) Communications Satellites- are microwave relay stations in orbit around the earth.

Reference: Williams B. & Sawyer, S. (2007). Italic textUsing Information Technology-A Practical Introduction to Computers & Communications. Boston: McGraw-Hill Irwin.