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下列关于网络核心层的描述中,正确的是 ( ) 。
A、为了保障安全性,应该对分组进行尽可能多的处理
B、将数据分组从一个区域高速地转发到另一个区域
C、由多台二、三层交换机组成
D、提供多条路径来缓解通信瓶颈

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软题库参考答案:B(仅供参考)

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