下列选项中,关于网络入侵检测系统的组成结构的描述中不正确的是( )。
A. 控制台和探测器之间的通信是不需要加密的
B. 网络入侵检测系统一般由控制台和探测器组成
C. 控制台提供图形界面来进行数据查询、查看警报并配置传感器。一个控制台可以管理多个探测器
D. 探测器的基本功能是捕获网络数据包,并对数据包进一步分析和判断,当发现可疑的事件时触发探测器发送警报
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下列选项中,不属于非授权访问的是( )。
A. 非法用户通过攻击使服务器瘫痪
B. 非法用户通过窃取口令的办法冒充合法用户进行操作
C. 非法用户通过猜测用户口令的办法冒充合法用户进行操作
D. 非法用户通过设法绕过网络安全认证系统来冒充合法用户进行操作
What would happen if consumers decided to simplify their lives and spend less on material goods and services This (1)_____ is taking on" a certain urgency as rates of economic growth continue to decelerate throughout the industrialized world, and (2)_____ millions of consumers appear to be (3)_____ for more frugal lifestyle. The Stanford Research Institute, which has done some of the most extensive work on the frugality phenomenon, (4)_____ that nearly five million American adults number" (5)_____ to and act on some but not all" of its basic tenets. The frugality phenomenon first achieved prominence as a middle-class (6)_____ of high consumption lifestyle in the industrial world during the 50"s and 60"s. In the Silent Revolution, Ronald Inglehart of the University of Michingan"s Institute of Social Research examined this (7)_____ in the United States and 10 Western European nations. He concluded that a change has taken place "from an (8)_____ emphasis on material well-being and physical security (9)_____ greater emphasis on the quality of life", that is, "a (10)_____ from materialism to postmaterialism". Inglehart calls the 60s the "fat year". Among their more visible trappings were the ragged blue jeans favored by the affluent young. Most of them (11)_____ from materialism; however, this was (12)_____ Comfortably fixed Americans were going (13)_____, (14)_____ making things last longer, sharing things with others, learning to do things for themselves and so on. But (15)_____ economically significant, it was hardly (16)_____ in a US Gross National Product climbing vigorously toward the $2 thousand billion mark (17)_____, as the frugality phenomenon matured—growing out of the soaring 80s and into the somber 90s—it seemed to undergo a (18)_____ transformation. American consumers continued to lose (19)_____ in materialism and were being joined by new converts who were (20)_____ frugality because of the darkening economic skies they saw ahead.
A. when
B. whereas
C. while
D. once
What would happen if consumers decided to simplify their lives and spend less on material goods and services This (1)_____ is taking on" a certain urgency as rates of economic growth continue to decelerate throughout the industrialized world, and (2)_____ millions of consumers appear to be (3)_____ for more frugal lifestyle. The Stanford Research Institute, which has done some of the most extensive work on the frugality phenomenon, (4)_____ that nearly five million American adults number" (5)_____ to and act on some but not all" of its basic tenets. The frugality phenomenon first achieved prominence as a middle-class (6)_____ of high consumption lifestyle in the industrial world during the 50"s and 60"s. In the Silent Revolution, Ronald Inglehart of the University of Michingan"s Institute of Social Research examined this (7)_____ in the United States and 10 Western European nations. He concluded that a change has taken place "from an (8)_____ emphasis on material well-being and physical security (9)_____ greater emphasis on the quality of life", that is, "a (10)_____ from materialism to postmaterialism". Inglehart calls the 60s the "fat year". Among their more visible trappings were the ragged blue jeans favored by the affluent young. Most of them (11)_____ from materialism; however, this was (12)_____ Comfortably fixed Americans were going (13)_____, (14)_____ making things last longer, sharing things with others, learning to do things for themselves and so on. But (15)_____ economically significant, it was hardly (16)_____ in a US Gross National Product climbing vigorously toward the $2 thousand billion mark (17)_____, as the frugality phenomenon matured—growing out of the soaring 80s and into the somber 90s—it seemed to undergo a (18)_____ transformation. American consumers continued to lose (19)_____ in materialism and were being joined by new converts who were (20)_____ frugality because of the darkening economic skies they saw ahead.
A. Indeed
B. Moreover
C. Therefore
D. However
下列选项中,哪一项攻击产生的效果表现在消耗带宽、消耗计算资源、使系统和应用崩溃等方面( )。
A. 非服务攻击
B. 非服务器攻击
C. 拒绝服务攻击
D. A,B,C都不正确