单项选择题

Which of the following is the correct wiring order for an RJ-11 two line jack？（）

A.Black，Green，Red，Yellow
B.Black，Red，Green，Yellow
C.Red，Black，Green，Yellow
D.Yellow，Red，Green，Black

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单项选择题

Which of the following determines if the alarm should sound or an entry delay should start？（）

A.The sensor itself
B.The way the zones are wired
C.The zone type
D.The digital dialer

单项选择题

Which of the following is a RF peer to peer mesh protocol used for lighting and other residential electronics？（）

A.Z-Wave
B.X10
C.CEBus
D.Wi-Fi

单项选择题

Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）

A.The power supply is faulty and should be replaced.
B.The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
C.The radio frequency interference （RFI） is being received as noise.
D.A plasma display is emitting infrared noise.