單項選擇題

IP地址192.168.23.41,已知該子網(wǎng)網(wǎng)的廣播地址為192.168.23.63,則子網(wǎng)掩碼為?()

A.255.255.255.0
B.255.255.255.192
C.255.255.255.128
D.255.255.255.64

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