问题 填空题

某公司在国际网互联中心申请了210.45.12.0/24一个C的IP地址,域名为abc.com.cn。该公司有一台web服务器(IP地址为210.45.12.11,主机名为S1)、一台FTP服务器(IP地址为210.45.12.12,主机名为S2)、一台MAIL服务器(IP地址为210.45.12.13,主机名为S3)和一台DNS服务器(IP地址为210.45.12.14,主机名为S4)。若你是该公司的网络管理员,使用一台装有windows 2003 Server服务器作为DNS服务器。

现已在正向搜索区域中添加了一些主机记录,但用户的浏览器地址栏中输入“http://s1.abc.com.cn”可以访问该公司的主页,但输入“http://www.abc.com.cn”却不能访问该公司的主页,问题出在哪儿如何解决

答案

参考答案:可能是没有将s1.abc.com.cn的别名设置为www.abc.com.cn,或者设置得不正确。可以在正向搜索区域中增加一条别名(CNAME)记录,使得真正的名字为s1.abc.com.cn。

解析:为了使一台主机有多个域名。通常使用别名资源记录(CNAME)。题中已能实现对s1.abc.com.cn的解析,说明已经有该服务器的主机记录(A),要使其能解析www.abc.com.cn,要添加一条别名资源记录(CNAME),别名为www.abc.com.cn,真实主机名为s1.abc.com.cn。

单项选择题

The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question. Answer all questions following the passage on the basis of what is stated or implied in the passage.

Congressman Hastings has proposed that Congress should abolish the Electoral College system for electing the president and replace it with a system of direct popular election. The Electoral College system is flawed, he argues, because it runs directly counter to the democratic principle that every citizen’s vote should count equally.

Because of the winner-take-all system in which the candidate who receives the most popular votes in a state receives all of that state’s electoral votes, the citizens who voted for the losing candidate are effectively disenfranchised from the national election, even if their candidate lost the state by only a handful of votes. Moreover, because each state’s number of electors is the same as its number of members of Congress, the citizens of small states get a disproportionately larger vote than citizens of more populous states. In the 1988 election, for example, the combined voting-age population of the six least populous states--Alaska, Delaware, North Dakota, South Dakota, Vermont, and Wyoming--was 3,119,000. These six states held 21 electoral votes among them. Florida, with a voting-age population of 9,614,000, also had 21 electoral votes. Because of inequities of this nature, there have been four presidential elections in which the candidate who won the Electoral College actually lost the popular vote: 1824, 1876, 1888, and 2000.

Congressman Markham has argued that Hastings’s proposed changes are unnecessary and even dangerous. First of all, he argues, the Electoral College system, whatever its flaws, has resulted in a stable democratic government for more than 200 years, which shows that it is doing something right. Second, the winner-take-all system helps create decisive majorities in the Electoral College, thereby reducing the problem of disputed elections that we might see in the event of direct popular elections. Third, the current system of allocating electors helps protect the interests of small states, which would be largely neglected in favor of large states if the Electoral College were based entirely on population. Protecting these states’ rights is essential to upholding the principle of federalism (in which the states and the federal government maintain distinct powers).

When the Electoral College system was first formalized by the Twelfth Amendment in 1804, a direct popular vote would have been impossible to implement, and the Electoral College was probably the best way to approximate the will of the people. Advances in technology and communication, however, now mean that a direct popular vote would be as simple, if not simpler, to administer than the current Electoral College system. Alternative ways to reform the system would be to do away with the winner-take-all system of state electors, to base the numbers of electors strictly on state populations, or to have a direct popular election but to weight the votes from different states differently in order to preserve the influence of small states.

Which of the following best describes the structure of the passage ?()

A. It presents a critique of an institution, then provides a defense of that institution, and then offers possible compromises between the two positions.

B. It presents an argument, lists problems with that argument, and then ultimately refutes the argument.

C. It discusses both sides of a controversial topic and then chooses the side with the per arguments.

D. It analyzes flaws in a traditional institution and then provides a series of steps to remedy the flaws.

E. It presents two competing viewpoints and then shows the logical errors in both positions.

问答题