| 软件水平考试系统分析师易错题（2018/12/10） |
| 第1题：需求分析最终结果是产生( )
A、项目开发计划 B、需求规格说明书 C、设计说明书 D、可行性分析报告 |
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| 第2题：主机A运行Unit操作系统，IP地址为202.113.224.35，子网屏蔽码为255.255.255.240。它们分别连接在同一台局域交换机上，但处于不同的VLAN中。主机通过ping命令去ping主机B时，发现接收不到正确的响应。可能的原因是( )
A、主机A主机B的IP地址不同 B、主机A和主机B处于不同的VLAN中 C、主机A和主机B使用了不同操作系统 D、主机A和主机B处于不同的子网中 |
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| 第3题：用户A通过计算机网络向用户B发消息，表示自己同意签订某个合同，随后用户A反悔不承认自己发过该条消息。为了防止这种情况发生，应采用( )
A、数字签名技术 B、消息认证技术 C、数据加密技术 D、身份认证技术 |
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| 第4题：自底向上的估计法的特点是( )
A、简单、工作量小、误差大 B、精度高，但缺少子任务(模块)间的联系 C、估算较精确，但区分类比较困难 D、复杂、不可行，一般不采用此种方法，但这种副作用可以通过详细的设计文档加以控制 |
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| 第5、6、7、8、9题：In the following essay, each bland has four choices.Choose the best answer and write down on the answer sheet. With the implementation of (6) the so – called network has become a reality. The provision of such facilities is the most important part of the network requirements. However, in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of (7) interface between user(application)program, normally referred to ,as application processes, and the underlying communication services may be (8). For example, one computer may be a small single-user computer, while another may be a large (9) system. In the earlier days of computer communication, these issues meant that only closed communities of computers (that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s systems NetworkArchitecture (SNA、andDEC’sDigital NetworkArchitectureDNA、are just two examples of communication software packages produced by manufacturers to allow their systems to be intercormected together. These proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem,(10) ,in the late 1970s,formulated a reference model to provide a common basis (or the coordination of standards developments and to allow existing and evolving standards activities to be placed into perspective with one another.
(6) A、communicationchannel B、protocols C、datachannel D、publiccommunication (7) A、database B、datarepresentation C、protocols D、datacommunication (8) A、same B、similar C、different D、dependent (9) A、multi-user B、client C、server D、full-user (10) A、DNA B、SNA C、theOSI D、theISO |
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