IP地址块211.64.0.0/11的子网掩码可写为______。
A) 255.192.0.0
B) 255.224.0.0
C) 255.240.0.0
D) 255.248.0.0
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IP地址块211.64.0.0/11的子网掩码可写为( )。A) 255.192.0.0B) 255.224.0.0C) 255.240.0.0D) 255.248.0.0
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