单项选择题

SwitchR1hasbeenconfiguredwithPrivateVLANs.WiththattypeofPVLANportshouldthe defaultgatewaybeconfigured？（）

A.Trunk
B.Isolated
C.Primary
D.Community
E.Promiscuous
F.Noneoftheotheralternativesapply
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单项选择题
TheCompanynetworkneedstopasstrafficbetweenVLANs.Whichdeviceshouldbeusedtoaccomplishthis？（）
A.Hub
B.Switch
C.Router
D.Bridge
E.Noneoftheotheralternativesapply
单项选择题
OnaCompanyswitchnamedR1youconfigurethefollowing：iparpinspectionvlan10－12，15WhatisthepurposeofthisglobalconfigurationcommandmadeonR1？（）
A.DiscardsARPpacketswithinvalidIP-to-MACaddressbindingsontrustedports
B.ValidatesoutgoingARPrequestsforinterfacesconfiguredonVLAN10，11，12，or15
C.Intercepts，logs，anddiscardsARPpacketswithinvalidIP-to-MACaddressbindings
D.InterceptsallARPrequestsandresponsesontrustedports
E.Noneoftheotheralternativesapply
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