單項選擇題

假設(shè)一個IP地址為192.168.5.121,而子網(wǎng)掩碼為255.255.255.248,那該主機的網(wǎng)絡號為()?

A.192.168.5.12
B.192.169.5.121
C.192.169.5.120
D.192.168.5.120

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