问题 单项选择题

在进行金融业务系统的网络设计时,应该优先考虑 (69) 原则。在进行企业网络的需求分析时,应该首先进行 (70)

(70)处填()。

A.企业应用分析

B.网络流量分析

C.外部通信环境调研

D.数据流向图分析

答案

参考答案:A

解析:

[分析]: 网络设计一般要遵循一些原则,包括先进性、开放性、经济性和高可用性。

· 先进性:是指建设一个现代化的网络系统,应尽可能采用先进而成熟的技术,应在一段时间内保证其主流地位。但是太新的技术也有不足之处,一是有可能不成熟,二是标准可能还不完备、不统一,三是价格高,四是可能技术支持力量不够。

· 开放性:是指采用国际通用的标准和技术获得良好的开放性,是网络互连互通的基础。

· 经济性:是指在满足需求的基础上,应该尽量节省费用。

· 高可用性:是指系统要有很高的平均无故障时间和尽可能低的平均故障率,一般需要采取热备份、冗余等技术。

金融系统涉及银行、众多储户的资产信息,数据重要、敏感,数据量庞大,必须要保证数据的绝对安全,同时要保证系统小的响应时间、很高的服务成功率,而且服务要完整、不间断,故障恢复能力强,整个系统要具有非常高的可用性和可靠性,并不追求采用先进的技术。另外,一般金融系统都是封闭运行的,开放性也不需要放在优先考虑的地位。因此在进行有关金融系统的网络设计时,高可用性是首要考虑的原则。

在进行企业网络的需求分析时应该首先进行企业的业务和应用分析,因为网络建设是企业应用的基础,网络系统要向企业的应用系统提供良好的服务,企业的应用需求是设计网络系统的重要依据。

选择题
单项选择题

That rapscallion who leaps off the monkey bars, landing smack onto an innocent 3-year-old bystander, and skips off, giggling all the while According to a new paper out of Israel, he may not feel all that bad about the incident. The study, conducted by Dr. In bal Kivenson Bar-On at the University of Haifa, shows that high levels of fearlessness in 3-and 4-year-olds is ply associated with aggression and a lack of sympathy. This news will likely surprise risk-loving America, where parents typically beam with pride when their undaunted child mounts the big slide.

Fearlessness is a far-end point on the spectrum of what psychologists call the "approach and withdrawal dimension"—people’s tendency to approach new stimuli (to gain information and acquire new skills ) and withdraw from unfamiliar stimuli (to avoid danger). Striking the right balance is considered crucial to man’s survival. But what about preschoolers’ There’s a clear downside, Dr. Kivenson Bar-On discovered, after she observed lots of preschool play and machinations. In total, she documented 80 children at preschool, home and in the lab, measuring their propensity for fearlessness and other social and emotional characteristics at the beginning and end of one year. Fearlessness was measured by observing reactions to various fright-inducing situations: separation from parents, the roar of a vacuum cleaner, a jack-in-the-box and the like. Those who displayed greater levels of fearlessness, the study found, had no trouble recognizing facial expressions of anger, surprise, happiness and sadness in other children—but they had a hard time identifying fear.

Over all, they were "emotionally shallow" and showed lower levels of sympathy. They took advantage of friends and lacked regret over inappropriate conduct. "These findings," the paper explains, " suggest that fearlessness in preschool constitutes a clear risk factor for developmental pathways that lead to problems in morality, conscience development, and severe antisocial behaviors. " At the same time, fearless children tended to be highly sociable. "One of the most interesting findings was that we could discriminate between friendliness and sympathy," Dr. Kivenson Bar-On said. "These kids are curious, easygoing and friendly, but they have a hard time recognizing emotional distress in others. "

Jamie Ostrov, a psychology professor at the State University at Buffalo who studies aggression, says that children at the extreme end of the fearless spectrurn "may be charming, but they’re also highly manipulative and deceptive and skilled at getting their way—even at age 3 or 4. " It could be that fearless children need per distress cues to active their autonomic nervous systems, limiting their ability to detect distress cues in others. It seems to be, if I’m not worried about this, you can’t be, either. But should we be

According to Dr. Kivenson Bar-On, fearless children()

A. have no sympathy

B. will have anti-social tendency

C. get well along with others

D. are foxy