2. 计算机
  3. Cloud computing is a type Of Intemet-based computing that provides shared computer processing resources and data to computers an

Cloud computing is a type Of Intemet-based computing that provides shared computer processing resources and data to computers an

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问题 Cloud computing is a type Of Intemet-based computing that provides shared computer processing resources and data to computers and other devices on demand．Advocates claim that cloud computing allows companies to avoid up-front infrastructure costs．Cloud computing now has few service form，but it is not including______________．
选项 A、IaaS
B、PaaS
C、SaaS
D、DaaS
答案D
解析 云计算是一种基于Internet的计算，它为计算机和其他设备提供共享的计算机处理资源和数据。拥护者声称，云计算允许公司避开前端的基础设施成本。云计算可以认为包括以下几个层次的服务：基础设施即服务(IaaS)，平台即服务(PaaS)和软件即服务(SaaS)，不包括DaaS。
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