问题
多项选择题
DNS服务器面临的安全隐患主要包括（）
A.DNS欺骗（DNSSpoffing）
B.拒绝服务（DenialofservicE.攻击
C.缓冲区漏洞溢出攻击（BufferOverflow）
D.缓存投毒（Cachepoisoning）
答案
参考答案：A, B, C, D
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DNS服务器面临的安全隐患主要包括（）
A.DNS欺骗（DNSSpoffing）
B.拒绝服务（DenialofservicE.攻击
C.缓冲区漏洞溢出攻击（BufferOverflow）
D.缓存投毒（Cachepoisoning）
参考答案：A, B, C, D
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| A boy who was cleaning shoes in the street said to a young man 1 by, "Let me clean your shoes, 2 ?" The young man said, "No, thank you." "You may 3 me only a pound for that, sir." said the boy. 4 the young man refused again. Then the boy told him that he would clean his shoes for 5 . The young man agreed to this, and soon one of his shoes was shining brightly. The man put 6 shoe on the boy, but the boy refused to clean it unless he 7 two pounds for his work. The young man refused to pay anything and went away. But one looked 8 dirty that he couldn't walk away. He had to 9 and gave the boy 10 . In a very short time his shoes shone brightly. | ||||
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