某主机的IP地址为202.100.1.254/22,其子网掩码是(28)。A.255.255.250.0B.255.255.252.0C.255.255.254.0D.255.255.255.0

某主机的IP地址为202.100.1.254/22,其子网掩码是(28)。

A.255.255.250.0

B.255.255.252.0

C.255.255.254.0

D.255.255.255.0


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