单项选择题
Which command enables RSTP on a switch?（）
A.spanning-tree mode rapid-pvst B.spanning-tree uplinkfast C.spanning-tree backbonefast D.spanning-tree mode mst
多项选择题 Which two commands can be used to verify a trunk link configuration status on a given cisco switch?（）
多项选择题 Which two states are the port states when RSTP has converged?（）
多项选择题 In an Ethernet network, under what two scenarios can devices transmit? （）
