单项选择题
A. routed mode
B. context mode
C. bridged mode
D. transparent mode
E. full security mode
单项选择题 HowdoestheEthernetRelayServiceusetheVLANtag？（）
单项选择题 WhichuniquecharacteristicsoftheDataCenterAggregationlayermustbeconsideredbyan EnterpriseCampusdesigner？（）
单项选择题 WhendesigningtheNetworkAdmissionControl（NAC）AppliancefortheEnterpriseCampus Network，whichofthefollowingrequirementswouldhelpthedesignertonarrowdowntheNAC choices，fromVirtualGatewaytoRealIPGateway，orfromIn-bandtoOut-band？（）