你懂的av

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                —臺主機的IP地址為202.113.224.68,子網屏蔽卐碼為255.255.255.240,那麽這臺主機的主機號ξ 為( )

                • A4
                • B6
                • C8
                • D68
                參考答案: A
                解題思路: 子網屏我就看看你如何抵擋我蔽碼為255.255.255.240,68轉化◤為二進制是01000100,240轉化零度為二進制是11110000,所以主機號0100部分,轉化為十進制是4。