单项选择题
IP172.16.40.1-172.16.40.255,要划若干个子网,每个子网里要有32台机器,请算出掩码?()
A.255.255.255.192
B.255.255.255.224
C.255.255.255.240
D.255.255.255.248
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单项选择题
A.255.255.255.192
B.255.255.255.224
C.255.255.255.240
D.255.255.255.248
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