What is a difference between the functions of Cloud computing and virtualization?

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What is a difference between the functions of Cloud computing and virtualization?

Cloud computing requires hypervisor technology whereas virtualization is a fault tolerance technology.
Cloud computing separates the application from the hardware whereas virtualization separates the OS from the underlying hardware.
Cloud computing provides services on web-based access whereas virtualization provides services on data access through virtualized Internet connections.
Cloud computing utilizes data center technology whereas virtualization is not used in data centers.

Explanation: Cloud computing separates the application from the hardware. Virtualization separates the OS from the underlying hardware. Virtualization is a typical component within cloud computing. Virtualization is also widely used in data centers. Although the implementation of virtualization facilitates an easy server fault tolerance setup, it is not a fault tolerance technology by design. The Internet connection from a data center or service provider needs redundant physical WAN connections to ISPs.

What is a difference between the functions of Cloud computing and virtualization?

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