ISC2 Certified Cloud Security Professional (CCSP) Practice Question
Your operations team reports that the public-cloud virtual machines hosting the company's e-commerce site are saturated every Friday night. Management wants the environment to automatically add or remove instances in real time so performance stays steady and charges reflect only what is actually consumed-without opening tickets or calling the provider. According to the NIST definition of cloud computing, which essential characteristic addresses this requirement?
NIST Special Publication 800-145 lists rapid elasticity as one of the five essential cloud characteristics. Rapid elasticity means resources can be provisioned and released quickly-often automatically-to scale out or in commensurate with demand, and to appear to customers as unlimited. On-demand self-service allows unilateral provisioning but does not inherently include automatic scaling. Resource pooling is about multi-tenant sharing of provider resources, and measured service refers to metering and billing, not dynamic capacity expansion.
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Concepts, Architecture and Design
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