If physical phone lines did not connect our houses to the phone company today, we would most likely build our nation's phone infrastructure using cellular and satellite services. Because the technology exists and ultimately it will be cheaper and easier to connect everyone using a wireless network versus a physical one. Wireless communication already affects your life on a daily basis, even if you don't realize it. From radio waves to infrared light beams, the devices in your home and office are communicating in a wireless way. Wireless connection from an information source to a device allows mobility, which means that we can use our devices in any place we desire.
Ubiquity is the concept of something appearing to be in all places, all the time.
In the past decade, many of the auto's systems were modified so that computers control their processing. Anti-lock brakes, fuel injection and traction control are just a few examples of how computers are used in an auto. The first is infrared , which is a light beam that bounces between emitters and receivers located in the two devices that are communicating. The second major type of communication channel used by wireless devices is radio wave . These devices use a specific frequency within the radio spectrum.