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22.基于检测理论的入侵检测可分为误用检测和______________。
IP 地址中的网络号所占位数越多,则一个网络内可以容纳的主机数_____
22.就检测理论而言,入侵检测技术可以分为异常检测和__________。
2.OSI安全体系结构中定义了五大类安全服务,其中,数据机密性服务主要针对的安全威胁是( )
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17.对计算机网络安全构成威胁的因素可以概括为:偶发因素、自然因素和__________三个方面。
一、单项选择题(本大题共15小题,每小题2分,共30分) 在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。错选、多选或未选均无分。 1.被动攻击主要是监视公共媒体传输的信息,下列属于典型被动攻击的是( )
19.NAT技术有三种类型:静态NAT、________,以及网络地址端口转换NAPT。
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36.劳动力成为商品的基本条件有( )
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Laziness is a sin, everyone knows that. We hare probably had all lectures 1.____ that laziness is immoral, that it is wasteful, that lazy people will never amount to 2.____ in life. But laziness can be more harmful than the, it is often caused by more complex reasons than simple wishes to avoid work. Some people who appear to be lazy are 3.____ much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task 4.____ ridicule or fear of having their ideas stolen. These people who seem lazy may be paralyzed by a fear of failure. 5.____, laziness can actually be helpful. Some people may look lazy when they are really thinking, planning, contemplating, researching. We should all remember that some great scientific discoveries occurred 6.____ or while someone was "goofing off(闲荡)". Newton wasn't working in the orchard when the apple hit him he devised the theory of7.____. All of us would like to have someone "lazy" build the car or stove we buy, particularly if that laziness were caused by the worker' s 8.____ to check each step of his work to do his job right. sometimes being lazy--that is, taking time off for a rest--is good for the overworked students or executives. Taking a rest can be particularly 9.____ to the athlete who is trying too hard or the doctor who's simply working himself overtime too many evenings at the clinic. So be careful when you're 10.____ to call someone lazy. That person may be thinking, or planning his or her next book.1. A. handing out B. standing out C. pointing out D. bringing out
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4.
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5.
全盘西化论的核心内容是()
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