______是指对提供某种网络服务的服务器发起攻击,造成网络的“拒绝服务”或丧失服务能力,致使网络工作不正常,甚至于完全不能工作。
A. 服务攻击
B. 非服务攻击
C. 对象攻击
D. 非对象攻击
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Beside the pleasurable sounds of music and expressive feeling that it ______ , music does exist in terms of notes themselves and of their manipulation.
A. gives away
B. gives off
C. gives up
D. gives in
What does co-education offer to children
A society.
B. A true small model of society.
C. A real life,
D. True version of social condition.
对于下列文件的物理结构,只能采用顺序存取方式的是______。
A. 顺序结构
B. 链接结构
C. 索引结构
D. Hash结构
已知IP=1000H,SP=2000H,BX=283FH,指令CALL WORD PTR [BX]的机器代码是FFl7H,试问执行指令后,(1FFEH)=( )。
A. 28H
B. 3FH
C. 00H
D. 02H