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试卷年份2018年下半年
试题题型【单选题】
试题内容

以下关于TCP/IP协议和层次对应关系的表示中,正确的是()。
A.
B.
C.
D.

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相关试题

62题: 在一条笔直公路的一边有许多房子,现要安装消防栓,每个消防栓的覆盖范围远大于房子的面积,如下图所示。现求解能覆盖所有房子的最少消防栓数和安装方案(问题求解过程中,可将房子和消防栓均视为直线上的点)。
该问题求解算法的基本思路为:从左端的第一栋房子开始,在其右侧m米处安装一个消防栓,去掉被该消防栓覆盖的所有房子。在剩余的房子中重复上述操作,直到所有房子被覆盖。算法采用的设计策略为(请作答此空);对应的时间复杂度为( )。

假设公路起点A的坐标为0,消防栓的覆盖范围(半径)为20米,10栋房子的坐标为(10,20,,30,35,60,80,160,210,260,300),单位为米。根据上述算法,共需要安装( )个消防栓。以下关于该求解算法的叙述中,正确的是( )。
(1) A.分治
B.动态规划
C.贪心
D.回溯
(2)A.Θ(lgn)
B.Θ(n)
C.Θ(nlgn)
D.Θ(n2)
(3) A.4
B.5
C.6
D.7
(4)A.肯定可以求得问题的一个最优解
B.可以求得问题的所有最优解
C.对有些实例,可能得不到最优解
D.只能得到近似最优解

答案解析与讨论:www.cnitpm.com/st/407522687.html

66题: 使用ADSL接入Internet,用户端需要安装( )协议。
A.PPP
B.SLIP
C.PPTP
D.PPPoE
答案解析与讨论:www.cnitpm.com/st/4075619779.html

67题: 下列命令中,不能用于诊断DNS故障的是( )。
A.netstat
B.nslookup
C.ping
D.tracert
答案解析与讨论:www.cnitpm.com/st/4075726272.html

69题: 把CSS样式表与HTML网页关联,不正确的方法是( )。
A.在HTML文档的<head>标签内定义CSS样式
B.用@import引入样式表文件
C.在HTML文档的<!--   -->标签内定义CSS样式
D.用<link>标签链接网上可访问的CSS样式表文件
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70题: 使用( )命令可以释放当前主机自动获取的IP地址。
A.ipconfig/all
B.ipconfig/reload
C.ipconfig/release
D.ipconfig/reset
答案解析与讨论:www.cnitpm.com/st/407605262.html

71题: The project workbook is not so much a separate document as it is a structure imposed on the documents that the project will be producing anyway.
All the documents of the project need to be part of this (请作答此空). This includes objectives ,external specifications , interface specifications , technical standards , internal specifications and administrative memoranda(备忘录).
Technical prose is almost immortal. If one examines the genealogy ( Ff ) of a customer manual for a piece of hardware or software , one can trace not only the ideas , but also many of the very sentences and paragraphs back to the first ( ) proposing the product or explaining the first design. For the technical writer, the paste-pot is as mighty as the pen.
Since this is so, and since tomorrow's product-quality manuals will grow from today’s memos, it is very important to get the structure of the documentation right. The early design of the project ( ) ensures that the documentation structure itself is crafted, not haphazard. Moreover, the establishment of a structure molds later writing into segments that fit into that structure.
The second reason for the project workbook is control of the distribution of ( ). The problem is not to restrict information, but to ensure that relevant information gets to all the people who need it.
The first step is to number all memoranda, so that ordered lists of titles are available and h worker can see if he has what he wants. The organization of the workbook goes well beyond this to establish a tree-structure of memoranda. The ( ) allows distribution lists to be maintained by subtree, if that is desirable.
A.structure
B.specification
C.standard
D.objective
答案解析与讨论:www.cnitpm.com/st/4076127115.html