问题

What is one benefit of PVST+?（）

A PVST+reduces the CPU cycles for all the switches in the network
B PVST+automatically selects the root bridge location,to provide optimized bandwidth usage.
C PVST+allow the root switch location to be optimized per vlan.
D PVST+supports Layer 3 load balancing without loops.

参考答案

参考解析：

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