正确答案: BC
物理攻击 硬件故障
题目:不属于物理安全威胁的是()
解析:BCE
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举一反三的答案和解析:
[单选题]When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user(115). In practice, the two media are normally audio and video, this is,(116)plus moving(117).It should be' obvious by now that transmitting multimedia material in uncompressed form. is completely out of(118). The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission(119).
interaction
[单选题]阅读以下说明和关系表,回答问题1~3。[说明]
和函数依赖集
解析:由自反律,有AB→A,AB→B
∵已知AB→D,D→C,∴由传递关系有
AB→C
由上可知,AB为候选码
由自反律,有BC→B,BC→C
∵又已知C→A,∴有BC→A
∵BC→A,BA→D,
∴BBC→D,即BC→D
由上可知,BC也为候选码
[单选题]在SNMPv2协议中共有6种协议数据单元(PDU),某台管理站可以利用(47)PDU将有关的管理信息告诉另一台管理站。
1nformRequest
解析:要点解析:管理站与管理站之间的请求/响应通信,即可以由一台管理站利用InformRequestPDU将有关的管理信息告诉另一台管理站。这种方法是SNMPv2新增的功tl2_一。InformRequest操作由ResponsePDU报文应答。本试题中,GetRequest、GetNextRequest、GetBulkRequest等操作均属于管理站对代理(Agent)系统的协议操作,这3种操作也是由ResponsePDU报文应答。