单项选择题
Phase I and Phase II DMVPN differ in terms of which of these characteristics？（）
A.Utilization of spoke-to-spoke dynamic tunnels B.Utilization of multipoint GRE tunnels at the hub site C.Utilization of hub-to-spoke dynamic tunnels D.Support for multicast
单项选择题 Whichoneofthefollowingpotentialissuesiseliminatedbyusingsplithorizon？（）
单项选择题 Whichswitchporterrorisanindicationofduplexmismatcheson10/100/1000IEEE802.3uGigabitEthernetports？（）
单项选择题 faCiscoswitchisconfiguredwithVTPv1intransparentmode，whatisdonewithreceivedVTPadvertisements？（）
