【单选题】
当网元之间通过以太网方式连接，处于同一以太网的网元的EMU的IP地址必须属于（ ）。___
A. 不同IP子网
B. 同一IP子网
C. 该IP子网既可以相同也可以不相同
D. B类子网
E.
F.
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答案
B
解析
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