Automation System
The hardware device Jhat acts as both a switching and connecting unit is called a(n):

concentrator
communications processor
RS-232C port
multiplexer
None of these

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Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

do not leave training manuals unsecured
do not allow unbonded service people to work on your equipment
Verify the reputation of the people installing your system
run regular simulated tests using TARP (testing of Applications Recovery Planes)
None of these

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