问题 单项选择题

某企业单位根据应用需求需要在会议室部署无线AP。为了保证只允许处于该会议室内的笔记本电脑接入此无线AP,规划师提出的系统安全解决方案最有可能是______。

A.在该无线AP上允许SSID广播,并对客户端的MAC地址进行过滤
B.在该无线AP上设置不广播SSID,并对客户端的IP地址进行过滤
C.在该无线AP上允许SSID广播,并对客户端的IP地址进行过滤
D.在该无线AP上设置不广播SSID,并对客户端的MAC地址进行过滤

答案

参考答案:D

解析: 某企业单位根据应用需求需要在会议室部署无线AP。为了保证只允许处于该会议室内的笔记本电脑接入此无线AP,可以在该无线AP上设置不广播服务集标识符(SSID),并对客户端的MAC地址进行过滤。该会议室的笔记本电脑安装无线网卡后,需要在“关联”选项卡的“网络名(SSID)”文本框中手工输入该会议室无线AP的SSID值。

单项选择题

Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge. When our education and job skills have grown obsolete, we are treated exactly like those who have never gained an education or job skills and are not encouraged or given the opportunity to begin anew.
As a society becomes more highly developed, the overall status of older people diminishes. Improved health technology creates a large pool of old people, who compete for jobs with the young. However, economic technology lowers the demand for workers and creates new jobs for which the skills of the aged are obsolete, forcing older people into retirement. At the same time, young people are being educated in the new technology and are keeping pace with rapid changes in knowledge. Finally, urbanization creates age-segregated neighborhoods. Because the old live on fixed incomes, they must often live in inferior housing. All these factors—retirement, obsolete knowledge and skills, inferior standards of living—lower the status of the aged in society.
A century ago, when one could expect to live only to 50 or so, the life span more or less coincided with the occupation and family cycle. But today the average life span allows for fifteen to twenty years of life after these cycles. It appears that our life span is outpacing our usefulness in society.

The sentence "our life span outpaces our usefulness" means we can live longer ______.

A.and make progress

B.and do more work

C.but move slowly

D.but become useless

听力题