单项选择题
使用26位掩码来划分子网,下面哪个地址是有效的子网()
A.172.16.43.16
B.172.16.128.32
C.172.16.243.64
D.172.16.157.96
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单项选择题
A.172.16.43.16
B.172.16.128.32
C.172.16.243.64
D.172.16.157.96
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