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Supervisory control and data acquisition (SCADA) is a system for remote monitoring and control that operates with coded signals over communication channels (using typically one communication channel per remote station).
In Figure 1, we depict an example SCADA system configuration used to monitor and. control wind power electric generation. The six items in Figure 1 instrumental to SCADA security are (1) the use of wireless bridges to. communicate with wind turbines, (2) the connection of a wireless bridge to Ethernet hub/switch, (3) the connection between the SCADA control center Ethernet switch/router and 3rd party and. administrative networks through a firewall, (4) modems attached to the main SCADA control.