单项选择题
A.PVST+reduces the CPU cycles for all the switches in the network
B.PVST+automatically selects the root bridge location,to provide optimiz…
C.PVST+allow the root switch location to be optimized per vlan.
D.PVST+supports Layer 3 load balancing without loops.
单项选择题 When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined（）。
多项选择题 Refer to the diagram. Which three statements describe the router port configuration and the switch port configuration as shown in the topology? （）
多项选择题 Refer to the diagram. All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network?（）