2. 计算机
  3. Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to

Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to

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问题 Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to be (72) to an outsider attack by preventing(73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users．Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment,but also helps to prevent future attacks．These attacks are usually (75) by tools referred to as Intrusion Detection Systems．
选项 A、searched
B、checked
C、tested
D、detected
答案D
解析 大部分计算机系统都很容易(vulnerable，脆弱的，易受攻击的)受到两种不同类型的攻击：来自内部的攻击和来自外部的攻击。一个系统可能通过禁止外部的访问(access，访问，接入)保证免受外部攻击，对于外部来说是安全的(secure)，但是仍然容易受到因用户授权的(authorized)滥用而引起的内部攻击。检测这种用户授权的滥用和来自外部的攻击，不仅提供能评估损害的信息，而且也助于防止以后再受到攻击。这些攻击通常使用被称为入侵检测系统的工具检测(detected)出来。
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