Glossaries: R

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Radio Frequency (RF)

Radio waves. This term generally means “wireless communication” when referred to in IoT discussions.

Radio Frequency Identification (RFID)

Generally speaking, this is the use of strong radio waves to “excite” enough current in a small tag to send a radio transmission back. It works over short range and only for small amounts of data.


Remote Authentication Dial-In User Service. RADIUS servers are responsible for receiving user connection requests, authenticating the user, and returning all configuration information necessary for the client to deliver service.

Remote Monitoring and Control

The increasingly automated monitoring and control of devices, technologies, or processes. Wireless devices which send information gathered directly to control centers are often used to achieve this.

Remote Sensing

The use of various technologies to make observations and measurements at a target that is usually at a distance or on a scale beyond those observable to the naked eye.


Representational State Transfer. An architecture for web standards, especially for the HTTP protocol. It is supposed to simplify the design of network applications compared to, for example, SOAP.

RESTful Web Services

Web services that are realized within the REST architecture are called RESTful Web Services. Also see REST.

RF Geolocation

A general term that applies to “finding” a radio transceiver with another. GPS is a good example. A good rule to remember is that to do RF geolocation well, you need a large RF bandwidth.


Radio Frequency Identification.