Information Technology Reference
In-Depth Information
c. The Internet of Transducers: Wireless Sensor Networks (SNS)
SNS consists of spatially distributed autonomous sensors to monitor
physical or environmental conditions, such as temperature, sound,
vibration, pressure, motion, or pollutants, and to cooperatively pass
their data through the network to a main location. The more modern
networks are bidirectional, becoming wireless sensor and actuator
networks (WSANs) enabling the control of sensor activities.
d. The Internet of Controllers: Supervisory Control and Data
Acquisition (SCADA)
SCADA is an autonomous system based on closed-loop control the-
ory or a smart system or a cyber physical system (CPS) that connects,
monitors, and controls equipment via the network (mostly wired
short-range networks, sometimes wireless or hybrid) in a facility
such as a plant or a building.
2.7 Summary
This chapter describes the genesis of computer networks at ARPANET, the
nature and type of networks, and the standard network models. It recounts
briefly the history of invention of the Internet and the WWW, ending with
some practical applications of the WWW.
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