题目内容：
A.CDPmustbedisabledontheswitchporttopreventinterferencebetweenCDPmessagesandvoicetraffic.
B.Portsecuritycannotbeconfiguredonaportthatisconfiguredforavoicevlan.
C.StaticsecureMACaddressesshouldbeconfiguredonvoicevlanportstopreventaccessbydevicesotherthanIPphones.
D.CDPmustbeenabledontheswitchporttoallowconfigurationinformationtobepassedtotheIPphone.
E.Portfastmustbeenabledontheswitchport.
F.802.1xauthenticationcannotbeconfiguredonaportconfiguredforavoicevlan.
参考答案：