问答题
using command “spanning-tree vlan ......
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WhichOSPFnetworktypeisidealforpartiallymeshedNBMAnetwor...
问答题Which OSPF network type is ideal for partially meshed NBMA networks because it is easy to configure（requires no configuration of neighbor commands）， consumes only one IP subnet， and requires no designated router election？
WhichOSPFfeatureallowsaroutertocontinuetoforwardpackets...
问答题Which OSPF feature allows a router to continue to forward packets while undergoing specific， well-known failure conditions？
WhyareRegistermessagesneededinPIMSM？
问答题Why are Register messages needed in PIM SM？
