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信息安全工程师每日一练试题内容（2021/8/2）

试题1： 文件型病毒不能感染的文件类型是（  ）。
A.SYS型
B.EXE类型
C.COM型
D.HTML型
试题解析与讨论：www.cnitpm.com/st/389728017.html
试题参考答案：D

试题2： 以下关于网络欺骗的描述中，不正确的是（  ）。
A. Web欺骗是一种社会工程攻击
B.DNS欺骗通过入侵网站服务器实现对网站内容的篡改
C.邮件欺骗可以远程登录邮件服务器的端口 25
D.采用双向绑定的方法可以有效阻止ARP欺骗
试题解析与讨论：www.cnitpm.com/st/411382082.html
试题参考答案：B

试题3： 强制访问控制(MAC)可通过使用敏感标签对所有用户和资源强制执行安全策略。 MAC中用户访问信息的读写关系包括下读、上写、下写和上读四种，其中用户级别高于文件级别的读写操作是 （  ）。
A.下读
B.上写
C.下写
D.上读
试题解析与讨论：www.cnitpm.com/st/4110411018.html
试题参考答案：C

试题4：

以下有关信息安全管理员职责的叙述，不正确的是（）
A、信息安全管理员应该对网络的总体安全布局进行规划
B、信息安全管理员应该对信息系统安全事件进行处理
C、信息安全管理员应该负责为用户编写安全应用程序
D、信息安全管理员应该对安全设备进行优化配置

试题解析与讨论：www.cnitpm.com/st/2844417488.html
试题参考答案：C

试题5： Trust is typically interpreted as a subjective belief in the reliability， honesty and  security  of an entity on which we depend （ ）our welfare .In online environments we depend on a wide spectrun of things , ranging from computer hardware,software and data to people and organizations. A security solution always assumes certain entities function according to specific policies.To trust is precisely to make this sort of assumptions , hence , a trusted entity is the same as an entity that is assumed to function according to  policy . A consequence of this is that a trust component of a system must work correctly in order   for the security of that system to hold, meaning that when a trusted（  ）fails , then the sytems and applications that depend on it can（  ）be considered secure.An often cited articulation of this principle is:＂ a trusted system or component is one that can break your security policy” ( which happens when the trust system fails ). The same applies to a trusted party such as a service provider ( SP for short )that is , it must operate according to the agreed or assumed   policy in order to ensure the expected level of securty and quality of services . A paradoxical   conclusion to be drawn from this analysis is that security assurance may decrease when increasing the number of trusted components and parties that a service infrastructure depends on . This is because the security of an infrastructure consisting of many.
Trusted components typically follows the principle of the weakest link , that is ,in many situations the the overall security can only be as strong as the least reliable or least secure of all the trusted components. We cannot avoid using trusted security components,but the fewer the better. This is important to understand when designing the  identity management architectures,that is, fewer the trusted parties in an identity management model , stronger the security that can be achieved by it.
The transfer of the social constructs of identity and trust into digital and computational concepts helps in designing and implementing large scale online markets and communities,and also plays an important role in the converging mobile and Internet environments.Identity management (denoted Idm hereafter ) is about recognizing and verifying the correctness of identitied in online environment .Trust management becomes a component of （  ）whenever different parties rely on each other for identity provision and authentication . IdM and Trust management therefore depend on each other in complex ways because the correctness of the identity itself must be trusted for the quality and reliability of the corresponding entity to be trusted.IdM is also an essential concept when defining  authorisation policies in personalised services.
Establishing trust always has a cost, so that having  complex trust requirement typically leads to high overhead in establishing the required trust. To reduce costs there will be incentives for stakeholders to “cut corners”regarding trust requirements ,which could lead to inadequate security . The challenge is to design IdM systems with relatively simple trust requirements.Cryptographic mechanisms are often a core component of IdM solutions,for example,for entity and data authentication.With cryptography,it is often possible to propagate trust from where it initially exists to where it is needed .The establishment of initial（  ）usually takes place in the physical world,and the subsequent propagation of trust happens online,often in an automated manner.
（71）A.with
B. on
C. of
D. for
（72）A.entity
B.person
C.component
D.thing
（73）A. No longer
B. never
C. always
D.often
（74）A. SP
B. IdM
C.Internet
D.entity
（75）A.trust
B.cost
C.IdM
D. solution
试题解析与讨论：www.cnitpm.com/st/389944612.html
试题参考答案：D、C、A、B、A

试题6： IPSec属于（  ）的安全解决方案。
A.网络层
B.传输层
C.应用层
D.物理层
试题解析与讨论：www.cnitpm.com/st/4113621566.html
试题参考答案：A

试题7：

未授权的实体得到了数据的访问权，这属于对安全的（）
A、机密性
B、完整性
C、合法性
D、可用性

试题解析与讨论：www.cnitpm.com/st/2845724103.html
试题参考答案：A

试题8： 防火墙的安全规则由匹配条件和处理方式两部分组成。当网络流量与当前的规则匹配时，就必须采用规则中的处理方式进行处理。其中，拒绝数据包或信息通过，并且通 知信息源该信息被禁止的处理方式是（  ）。
A. Accept
B. Reject
C. Refuse
D. Drop
试题解析与讨论：www.cnitpm.com/st/411447532.html
试题参考答案：B

试题9： 外部网关协议BGP是不同自治系统的路由器之间交换路由信息的协议，BGP-4使用四种报文:打开报文、更新报文、保活报文和通知报文。其中用来确认打开报文和周期性地证实邻站关系的是（  ）。
A.打开报文
B.更新报文
C.保活报文
D.通知报文
试题解析与讨论：www.cnitpm.com/st/411084710.html
试题参考答案：C

试题10：

已知DES算法的S盒如下：

如果该S盒的输入110011，则其二进制输出为（）
A、0110
B、1001
C、0100
D、0101

试题解析与讨论：www.cnitpm.com/st/2846923214.html
试题参考答案：C