更多"[单选题]Cloud computing is a phrase us"的相关试题:
[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_(请作答此空)__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 infrastructure layer is built with virtualized compute,storage,and network resources.The platform layer 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 infrastructure layer serves as the_( )__for building the platform layer of the cloud.In turn,the platform layer is foundation for implementing the_( )__layer for SaaS application.
A.replacement
B.switch
C.substitute
D.synonym