单项选择题 VLAN标记中TPID字段固定值为（）。

单项选择题 Intheoperatephase，providingandmaintainingreliable，currentinformationabouttheWLANsystem hardware，software，andapplicationspertinenttothesystem’sindividualcomponentsandattributesispartofwhichservicecomponent？（）A.ProblemManagementB.ConfigurationManagementC.IncidentManagementD.ChangeManagement

单项选择题 Oneofyourcustomershasdecidedtodeploylocation-basedservicesinadditiontoexistingwireless services.Thecustomerrequiresthattheadditionalaccesspointstobedeployedinmonitor-onlymode.Themostlikelyreasonforthisrequirementisthatthecustomerhaswhichoftheseexistingwirelessdevices？（）A.DataCollectionB.802.11b/gVoIPC.802.11bandgclientsD.RFIDtags