單項選擇題

給定IP地址為192.168.168.188掩碼255.255.255.192,下列哪個是有效的主機地址范圍?()

A.192.168.168.129-190
B.192.168.168.129-191
C.192.168.168.128-190
D.192.168.168.128-192

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