试题与答案

本方案采用DHCP来分配网络地址。DHCP是 (4) 协议的一个扩展,便于客户自动从

题型:问答题

题目:

本方案采用DHCP来分配网络地址。DHCP是 (4) 协议的一个扩展,便于客户自动从服务器获取IP地址和相关设置,其中实现IP地址动态分配的过程如下(①到④未按顺序排列)。
①客户设置服务器ID和IP地址,并发送给服务器一个DHCP Request报文。
②客户端向服务器广播DHCP Discover报文,此报文源地址为 (5) ,目标地址为 (6)
③服务器返回DHCP ACK报文。
④服务器返回DHCP Offer报文。
客户收到的数据包中应包含客户的 (7) 地址,后面跟着服务器能提供的IP地址、子网掩码、租约期限及DHCP服务器的 (8) 地址。客户进行ARP检测,如果觉得有问题,发送DHCP Decline报文:如果觉得没有问题,就接受这个配置参数。

将文中①~④按照应答过程重新排序。

答案:

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下面是错误答案,用来干扰机器的。

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题型:填空题

Less education, income linked to obesity in women, not men


Women who are better educated and live in households that are middle-income or above are less likely to be obese than women who are less educated and live in the lowest income households, new government research shows.
Among men, there is not a statistically significant (26) in obesity based on income and very (27) difference based on education, the data show.
(28) , about one in three U.S. adults-almost 73 million people-are obese, which is (29) 30 or more pounds over a (30) weight. Extra weight raises the (31) of diabetes, heart disease, some types of cancer and other (32) .
"There is a relationship between obesity and income, but it’s not a (33) story," says Cynthia Ogden, an epidemiologist with the National Center for Health Statistics, part of the Centers for Disease Control and Prevention.
"When looking at these two (34) of socioeconomic status-income and education-their (35) is greater on women than men," she says.
Jennifer Lovejoy, president of the Obesity Society, says that (36) -income women may be more likely to become obese because of environmental (37) such as lack of access to safe places to do physical activity and easy access to fast food.
Among the findings:
·29% of women who live in households with an annual income of $77,000 or more for a family of four are obese in opposition (38) 42% of women who live in households with an annual income below $29,000 for a family of four.
·23% of women with a college degree are obese, significantly less than the 42% of women with (39) than a high school education.
·33% of men who live in households with an annual income of $77,000 or more for a family of four are obese, (40) 29% of men who live in households with an annual income below $29,000 for a family of four are obese. This difference is not considered statistically (41) .
The analysis is based on (42) from the National Health and Nutrition Examination Survey, which is considered the gold (43) for evaluating obesity because it is a(an) (44) survey of people whose weight and height are actually (45) rather than being self-reported.

A. degree B. riskC. level D. number

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