单项选择题
A.Z-Wave
B.X10
C.CEBus
D.Wi-Fi
单项选择题 WhichofthefollowingisMOSTlikelycausinganintermittentflashingLEDonanIRreceiverwhentheremotecontrolisnotbeingused？（）
单项选择题 Acustomernotifiestheintegratorthatthesystemkeypadreportstroubleatawindow.Uponinspection，thecustomerfindsthewindowclosedandlocked；thecustomerresetsthesystemanditfailstocorrecttheissue.Whichofthefollowingstepsshouldtheintegratortaketoresolvetheissue？（）
单项选择题 Wheninstallingasecuritysystem，whichofthefollowingconnectorswouldbeusedtoconnectthesecuritysystemtothetelephoneservicedemarcation？（）