Which two values are used by Spanning Tree Protocol to elect a root bridge?

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问题 Which two values are used by Spanning Tree Protocol to elect a root bridge?

选项 A、amount of RAM
B、bridge priority
C、IOS version
D、IP address
E、MAC address

答案B,E

解析生成树的选举的问题，根桥的选举是通过比较ＢＩＤ的，而ＢＩＤ由桥优先级和ＭＡＣ地址组成的．所以在选根桥的时候需要比较的是桥优先级和ＭＡＣ　address。

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思科640802

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