Anadministratorhaspurchasedmonitoringsoftwarethatcanbeconfiguredtosendalertswhen hardwareandapplicationsarehavingissues.Whichofthefollowingmustbeinstalledonthemonitoring serversothatitcanproperlymonitordetailsonvendorspecificdevices？（）
A.MIBs
B.SMTP
C.WMI
D.DHCP
参考答案：A
