Which two benefits are provided by using a hierarchical addressing network addressing scheme?

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问题 Which two benefits are provided by using a hierarchical addressing network addressing scheme?

选项 A、        reduces routing table entries
B、        auto-negotiation of media rates
C、        efficient utilization of MAC addresses
D、        dedicated communications between devices
E、        ease of management and troubleshooting

答案A,E

解析 提供分层的网络地址规划,第一个我们容易实时路由汇总从而减少路由条目,第二给我们在管理方面还错误排查方面提供了便利
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