题目内容

试题一（共25分）
阅读以下关于数字视频监控告警系统的叙述，回答问题1至问题3。
随着宽带应用快速发展，用户要求系统服务提供商提供基于互联网的多种服务。数字视频监控作为一种区域级的安全监控方式，越来越为更多的用户所使用。数字视频监控告警系统采用与数字视频监控相结合的多媒体技术和基于互联网的信息传递方案，为企业用户以及个人用户提供多种媒体的、不同时间、地点的信息通知服务。数字视频监控告警系统可以将用户需要查看的监控视频或告警信息，通过互联网门户系统以多种媒体方式传送给用户，方便用户随时随地了解与自身相关的视频信息。
【问题1】（10分）
在设计数字视频监控告警系统时，张工将该系统划分为5个层次：服务代理层、门户服务层、流程服务总线层、业务流程应用管理层和企业服务层，其中流程服务总线层是整个数字视频监控告警系统的核心，实现了服务消息、服务指令与数据的集中传递。系统五个层次在实现时可以采用图1-1左侧所示的技术或工具，请将系统的5个层次填入空(1)～(5)，使其与左侧技术或工具相对应。
【问题2】（8分）
请用300字以内文字说明服务代理层、门户服务层、业务流程应用管理层和企业服务层的主要功能。
【问题3】（7分）
张工认为，系统设计实现时需要重点关注系统的私密性、实时性、稳定性和扩展性，为什么？请用300字以内文字说明

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Which person or people
found on returning years later that nothing had changed？ 0 E
was unable to count on the train service？【S1】
enjoyed the company of fellow passengers？【S2】
found the views from the train dramatic？【S3】【S4】
welcomed a chance to relax on the trip？【S5】
was never disappointed by the journey？【S6】
has a reason for feeling grateful to one special train？【S7】
traveled on a railway which is no longer in regular service？【S8】
regretted not going on a particular train trip？【S9】
used to travel on the railway whenever possible？【S10】
learnt an interesting piece of information on a train journey？【S11】
took a train which travelled from one country to another？【S12】
says that the railway had been looked after by unpaid helpers？【S13】
was once considered not old enough to travel by train？【S14】
On the rails
Five celebrities tell Andrew Morgan their favourite memories of railway journeys.
A Andrea Thompson—Newsreader
I fell in love with the south of France a long time ago and try to get back there as often as I can. There's a local train from Cannes along the coast which crosses the border with Italy. It takes you past some of the most amazing seascapes. It never matters what the weather is like, or what time of the year it is, it is always enchanting. Out of the other window are some of the best back gardens and residences in the whole of France. You feel like someone peeping into the property of the rich and famous. The travelers themselves are always lively because there is an interesting mix of tourists and locals, all with different itineraries but all admirers of the breath taking journey.
B Rod Simpson—Explorer
I have enjoyed so many rail journeys through the years, but if I had to pick a favourite it would be the Nile Valley Express, which runs across the desert of northern Sudan. The one misfortune in my youth, growing up in South Africa, was missing out on a family train journey from Cape Town to the Kruger National Park. I was regarded as being too young and troublesome and was sent off to an aunt. When I came to live in England as a teenager, I still hadn't travelled by train. London Waterloo was the first real station I ever saw and its great glass dome filled me with wonder.
C Betty Cooper—Novelist
I am indebted to one train in particular: the Blue Train, which took my husband and me on our honeymoon across France to catch a boat to Egypt. It was on the train that my husband gave me a pink dress, which I though

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