WhattwofeaturesinCiscoswitcheshelppreventLayer2loops?()A.UniDirectionalLinkDetectionB.HotStandbyRouterProtocolC.VirtualRouterRedundancyProtocolD.PortFastE.rootguardF.loopguard
题目
WhattwofeaturesinCiscoswitcheshelppreventLayer2loops?()
A.UniDirectionalLinkDetection
B.HotStandbyRouterProtocol
C.VirtualRouterRedundancyProtocol
D.PortFast
E.rootguard
F.loopguard