题目内容
阅读以下关于Web应用系统负载均衡的问题，在答题纸上回答问题12至问题14。某电子商务公司的主要业务是书籍、服装、家电和日用品的在线销售。随着公司业务发展和用户规模的不断扩大，现有的网上交易系统无法正常处理日益增大的请求流量，公司决策层决定升级其网上交易系统。在对该系统的升级方案进行设计和讨论时，公司的系统分析师王工提出采用基于高性能主机系统的方法进行系统升级，另外一位系统分析师李工则提出采用基于负载均衡集群的方法进行系统升级。公司的分析师和架构师对这两种思路进行讨论与评估，最终采纳了李工的方法。 负载均衡通常分为传输层负载均衡和应用层负载均衡两类。请基于这种分类方式，说明基于DNS的负载均衡方法和基于HTTP重定向服务器的负载均衡方法分别属于哪类负载均衡方法，并用200字以内的文字说明这两种方法实现负载均衡的方式。
查看答案
搜索结果不匹配？点我反馈
更多问题
People are indulging in an illusion whenever they find themselves explaining at a cocktail (鸡尾酒) party, say, that they are "in computers," or "in telecommunications," or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between US, they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are (71) of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working groups(紧密联系在一起的工作小组), we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions.The main reason we tend to focus on the (72) rather than the human side of the work is not because it’s more (73) , but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figuring out why Horace is in a blue funk (恐惧) or why Susan is dissatisfied with the company after only a few months. Human interactions are complicated and never very crisp (干脆的, 干净利落的) and clean in their effects, but they matter more than any other aspect of the work.If you find yourself concentrating on the (74) rather than the (75) , you’re like the vaudeville character (杂耍人物) who loses his keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!". 71（）
阅读以下关于宏观经济数据库建设的叙述，在答题纸上回答问题4至问题6。A市经过软课题研究已经形成了一整套宏观经济指标体系，用于描述该市的经济状态，涉及包括区域GDP、人口与就业、城市建设与投资、财政收入和支出、土地、进出口贸易、社会保障、人民生活、制造业和高新技术产业等方面，并为主要指标建立了计算模型。与宏观经济指标有关的数据称为宏观经济数据，主要的宏观经济数据广泛地分布于政府统计部门、计划部门、财政部门、税收部门、教育部门、商业部门、物价部门、农业主管部门、工业信息化主管部门等等，还分布于金融部门、大中型企业等。这些部门针对自身业务，多数都有自己的管理信息系统或者办公自动化系统，主要的宏观经济数据都已经实现了电子化。目前，A市宏观经济指标的获得还采取传统方式，即通过有关部门逐级报表汇总宏观经济数据的方式和统计调查的方式得到。统计调查方式存在系统性的误差，而报表汇总方式则存在基础数据不准确、人为影响较大、指标分析灵活性差等问题。为准确掌握经济动态信息，进一步规范各级经济信息资源管理行为，加快信息资源共享，提高政府的管理科学化和服务社会化水平，该市决定建设宏观经济数据库，将宏观经济数据统一管理。 为稳步推动A市宏观经济数据库建设，A市市政府委托咨洵公司B进行项目原型研究。B公司经过调研，认为A市电子政务网络、存储和计算平台非常完善，为宏观经济数据库的建设奠定了良好的基础。请用200字以内文字指出此时B公司在进行原型分析的时候应重点做好哪几方面的工作？
阅读以下关于宏观经济数据库建设的叙述，在答题纸上回答问题4至问题6。A市经过软课题研究已经形成了一整套宏观经济指标体系，用于描述该市的经济状态，涉及包括区域GDP、人口与就业、城市建设与投资、财政收入和支出、土地、进出口贸易、社会保障、人民生活、制造业和高新技术产业等方面，并为主要指标建立了计算模型。与宏观经济指标有关的数据称为宏观经济数据，主要的宏观经济数据广泛地分布于政府统计部门、计划部门、财政部门、税收部门、教育部门、商业部门、物价部门、农业主管部门、工业信息化主管部门等等，还分布于金融部门、大中型企业等。这些部门针对自身业务，多数都有自己的管理信息系统或者办公自动化系统，主要的宏观经济数据都已经实现了电子化。目前，A市宏观经济指标的获得还采取传统方式，即通过有关部门逐级报表汇总宏观经济数据的方式和统计调查的方式得到。统计调查方式存在系统性的误差，而报表汇总方式则存在基础数据不准确、人为影响较大、指标分析灵活性差等问题。为准确掌握经济动态信息，进一步规范各级经济信息资源管理行为，加快信息资源共享，提高政府的管理科学化和服务社会化水平，该市决定建设宏观经济数据库，将宏观经济数据统一管理。 小张是B公司的开发经理，在开发A市宏观经济数据库原型的时候，用前端分析工具按照指标计算模型，计算“宏观投资现状”指标，该指标计算模型的输入参数包括：交易额，信息来源是市国税局和市地税局的税收征管系统；项目立项信息，信息来源是市发改委的立项审批管理系统；资金拨付信息，信息来源是市财政局的统一支付系统；贷款信息，信息来源于银行的信贷管理系统等；资源消耗信息，信息来源于电力公司、自来水公司等。……小张按照输入参数来源单位提供的数据接口说明取得了输入参数，经过计算得到了“宏观投资现状”指标，但发现该指标与传统方式得到的指标差别很大。请用200字以内文字，指出存在差别的可能技术原因。
第二篇 Shopping at Second-hand Clothing Stores When 33-year-old Pete Barth was in college, shopping at second-hand clothing stores was just something he did - "like changing the tires on his car." He looked at his budget, and decided he could save a lot of money by shopping for clothes at thrift shops. "Even new clothes are fairly disposable (用后即丢掉的) and wear out after a couple of years," Barth said. "In thrift shops, you can find some great stuff whose quality is better than new clothes." Since then, Barth, who works at a Goodwill thrift shop in the US state of Florida, has found that there are all kinds of reasons for shopping for second-hand clothing. Some people like him, shop to save money. Some shop for a crazy-looking shirt. And some hop as a means of conserving energy and helping the environment. Pat Akins, an accountant at a Florida Salvation Army (SA) (救世军) thrift shop, said hat, for her, shopping at thrift shops is a way to help the environment. "When my daughter was little, we looked at it as recycling," Akins said. "Also, why ay 30 dollars for a new coat when you can get another one for a lot less" Akins said that the SA has shops all over the US - "some as big as department stores." All of the clothes are donated (捐赠), and when they have a surplus (盈余), they’ll have "stuff a bag" specials, where customers can fill a grocery sack with clothes for only or 10 dollars. Julia Slocum, 22, points out, however, that the huge amount of second-hand clothing in the US is the result of American wastefulness. I’d say that second-hand stores are the result of our wasteful, materialistic culture," said Slocum, who works for a pro-conservation organization, the Center for a New American Dream. "Thrift shops prevent that waste from going to landfills (垃圾填埋场); they give clothing a second life, provide cheaper clothing for those who can’t afford to buy new ones and generate (生成) income for charities. They also provide a way for the wealthy and middle classes to shed (摆脱) some of the guilt for their level of consumption." Which statement about Barth is NOT true
微信支付 
支付宝支付