Which of the following descriptions about cloud computing is wrong?

Question

Options

• ASupport users to use multiple devices to use cloud resources through the network
• BUsing the software-defined method, the data fault tolerance is not high
• CIt has the characteristics of on-demand self-service and meterable services
• DThe bottom layer can use virtualization technology to improve resource utilization

• A
  15% (10)
• B
  75% (49)
• C
  3% (2)
• D
  6% (4)

Explanation

Option B is the incorrect statement about cloud computing, making it the right answer. Cloud computing's software-defined approach - including Software-Defined Networking (SDN) and Software-Defined Storage (SDS) - actually enables high fault tolerance by allowing dynamic replication, redundancy, and failover mechanisms across distributed resources. The claim that fault tolerance "is not high" is the opposite of reality.

Why the other options are correct:

• A is true - cloud's network-based delivery model is precisely what allows access from phones, tablets, laptops, and other devices simultaneously.
• C is true - on-demand self-service and measured/metered service are two of the five essential characteristics defined in the NIST cloud computing model.
• D is true - virtualization is a core enabling technology at the infrastructure layer, allowing multiple workloads to share physical hardware and dramatically improving utilization rates.

Memory tip: Associate "software-defined" with "smarter resilience" - cloud uses software to automate redundancy and replication, so fault tolerance goes up, not down. If an answer says software-defined reduces reliability, flag it as suspicious.

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