What provides connectivity for portable and mobile applications?
Wireless is a term used to describe telecommunications in which electromagnetic waves (rather than some form of wire) carry the signal over part or all of the communication path.Some monitoring devices, such as intrusion alarms, employ acoustic waves at frequencies above the range of human hearing; these are also sometimes classified as wireless. Show
The first wireless transmitters went on the air in the early 20th century using radiotelegraphy (Morse code). Later, as modulation made it possible to transmit voices and music via wireless, the medium came to be called "radio." With the advent of television, fax, data communication, and the effective use of a larger portion of the spectrum, the term "wireless" has been resurrected. Common examples of wireless equipment in use today include:
Wireless technology is rapidly evolving, and is playing an increasing role in the lives of people throughout the world. In addition, ever-larger numbers of people are relying on the technology directly or indirectly. (It has been suggested that wireless is overused in some situations, creating a social nuisance.) More specialized and exotic examples of wireless communications and control include:
Wireless can be divided into:
Wireless Local area network (wLAN): uses radio waves rather than wires to transmit information across a local area network. Cellular phones and pagers: provide connectivity for portable and mobile applications, both personal and business. Cordless Computer Peripherals: connect wirelessly to a computer, such as a cordless mouse, keyboard, and printer. Satellite television: allows viewers in almost any location to select from hundreds of channels. WiMAX wireless broadband: enables wireless networks to extend as far as 30 miles and transfer information, voice, and video at faster speeds than cable. It is perfect for Internet service providers (ISPs) that want to expand into sparsely populated areas, where the cost of bringing in cable wiring or DSL is too high. Security Sensor: alerts customers to break-ins and errant pop files. Its dual sensors record vibration and acoustic disturbances-a shattered window-to help avoid fase alarms. Personal Digital Assistants (PDA): are small, hadheld computers capable of entirely digital communications transmission. Smartphone: combines the functions of a cellular phone and a PDA in s single device. Bluetooth: is a telecommunictions industry specification that describes how mobile phones, computers, and personal digital assistants (PDAs) can be easily interconnected using a short-range wireless connection. Satellite: is a big microwave repeater in the sky. Microwave transmitter: uses the atmosphere (or outer space) as the transmission medium to send the signal to a microwave receiver. Location-based services (LBS): are wireless mobile content services that provide location-specific information to mobile users moving from location to location. Global Positioning System (GPS): is a constellation of 24 well-spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location. Geographic information system (GIS): is designed to work with information that can be shown on a map. Wireless fidelity (wi-fi): is a means of linking computers using infrared or radio signals. Radio Frequency Identification (RFID) technologies: use active or passive tags in the form of chips or smart labels that can store unique identifiers and relay this information to electronic readers. What is a telecommunications technology aimed at providing wireless data over long distances?WiMAX, the Worldwide Interoperability for Microwave Access, is a telecommunications technology aimed at providing wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access.
What is a constellation of 24 well spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location?The GPS (Global Positioning System) is a "constellation" of 24 well-spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location. The location accuracy is anywhere from 100 to 10 meters for most equipment.
What is a wireless PAN technology that transmits signals over short distances?The digital divide is a wireless PAN technology that transmits signals over short distances among cell phones, computers, and other devices.
What is wireless quizlet?wireless. telecommunications in which electromagnetic waves carry the signal btwn communicating devices.
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