A.Black，Green，Red，YellowB.Black，Red，Green，YellowC.Red，B……

单项选择题Whichofthefollowingdeterminesifthealarmshouldsoundoranentrydelayshouldstart？（）

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

单项选择题WhichofthefollowingisaRFpeertopeermeshprotocolusedforlightingandotherresidentialelectronics？（）

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

单项选择题WhichofthefollowingisMOSTlikelycausinganintermittentflashingLEDonanIRreceiverwhentheremotecontrolisnotbeingused？（）

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.

单项选择题Acustomernotifiestheintegratorthatthesystemkeypadreportstroubleatawindow.Uponinspection，thecustomerfindsthewindowclosedandlocked；thecustomerresetsthesystemanditfailstocorrecttheissue.Whichofthefollowingstepsshouldtheintegratortaketoresolvetheissue？（）

A.Check that the sensor is not misaligned.
B.Clean the space between the sensor and the plate.
C.Toggle the tamper switch to reset the sensor.
D.Bypass the zone.

单项选择题Wheninstallingasecuritysystem，whichofthefollowingconnectorswouldbeusedtoconnectthesecuritysystemtothetelephoneservicedemarcation？（）

A.RJ-31x
B.RJ-11
C.RS-232
D.DB-9