单项选择题
某部门申请到一个C类IP地址,若要分成八个子网,其掩码应为()
A.255.255.255.255
B.255.255.255.0
C.255.255.255.224
D.255.255.255.192
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单项选择题
A.255.255.255.255
B.255.255.255.0
C.255.255.255.224
D.255.255.255.192
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