Discussion
Match each NIST essential characteristic with what it means.
List I
A. On-demand self-service
B. Resource pooling
C. Rapid elasticity
D. Measured service
List II
1. scaling out and in quickly with demand
2. provisioning without human interaction
3. metering that supports pay per use
4. multi-tenant sharing of a common pool
Answer: B
Correct answer: A-2, B-4, C-1, D-3
Each characteristic names a distinct property. Self-service is provisioning without human interaction on the provider’s side. Resource pooling is the multi-tenant sharing of a common pool, which is what makes the economics work. Rapid elasticity is scaling out and in quickly with demand. Measured service is the metering that makes pay-per-use possible - and without it, elasticity would have no commercial consequence.
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