答案及解析：[单选题]Cloud computing is a phrase used to describe a variety of computing concepts that involve a large nu - 软件水平题库- 答案窝(daanwo.com)-大学生作业答案及考资分享平台

问题：

[单选题] Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers（）through a real-time communication network such as the Internet. In science, cloud computing is a（）for distributed computing over a network, and means the（）to run a program or application on many connected computers at the same time.The architecture of a cloud is developed at three layers: infrastructure, platform, and application. The infrastucture layer is built with virtualized computestorageand network resources. The platform lay-er is for general-purpose and repeated usage of the collection of software resources. The application layer is formed with a collection of all needed software modules for SaaS applications. The infrastucture layer serves as the（请作答此空）for building the platform layer of the cloud. In turn, the platform layer is founda-tion for implementing the（）layer for SaaS application.A.networkB.foundationC.softwareD.hardware
A.见图A
B.见图B
C.见图C
D.见图D

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答案解析：

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