● 某主机的IP地址为200.15.13.12/22,其子网掩码是 (30) 。(30)A. 255.255.248.0B. 255.255.240.0C. 255.255.252.0D. 255.255.255.0
● 某主机的IP地址为200.15.13.12/22,其子网掩码是 (30) 。
(30)
A. 255.255.248.0
B. 255.255.240.0
C. 255.255.252.0
D. 255.255.255.0
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