168.1.0/28的子网掩码是:() A.255.255.255.0B.255.255.255.128C.255.255.255.192D.255.255.255.240

168.1.0/28的子网掩码是:()

A.255.255.255.0

B.255.255.255.128

C.255.255.255.192

D.255.255.255.240


相关考题:

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