2. 计算机
  3. (2012年上半年上午试题71～75) At a basic level，cloud computing is simply a means of delivering IT resources as ______【C1】．Almost all

(2012年上半年上午试题71～75) At a basic level，cloud computing is simply a means of delivering IT resources as ______【C1】．Almost all

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问题 (2012年上半年上午试题71～75)
    At a basic level，cloud computing is simply a means of delivering IT resources as  ______【C1】．Almost all IT resources can be delivered as a cloud service：applications，compute power，storage capacity，networking，programming tools，even communication services and collaboration______【C2】．
    Cloud computing began as large-scale Internet service providers such as Google，Amazon，and others built out their infrastructure．An architecture emerged：massively scaled，______【C3】distributed system resources，abstracted as virtual IT services and managed as continuously configured，pooled resources．In this architecture，the data is mostly resident on ______【C4】“somewhere on the Intemet”and the application i’uns on both the“cloud servers”and the user’Sbrowser．
    Both clouds and grids are built to scale horizontally very efficiently．Both are built to withstand failures of______【C5】 elements or nodes．Both are charged on a per-use basis．But while grids typically process batch jobs，with a defined start and end point，cloud services can be continuous．What’s more，clouds expand the types of resources available-file storage，databases，and Web services-and extend the applicability to Web and enterprise applications．
【C4】
选项 A、clients
B、middleware
C、servers
D、hard disks
答案C
解析
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