Explain why the cloud is described as elastic and pooled.
Elastic:
Cloud services can rapidly increase or decrease compute, storage, and network resources to match demand. This elasticity allows automatic scaling (up and down) so applications obtain more resources during peak load and release them during low load, providing performance consistency and cost efficiency through pay-as-you-go pricing.
Pooled:
Cloud providers aggregate (pool) physical and virtual resources and allocate them to multiple customers on demand. This multi-tenant pooling maximizes resource utilization, enables workload isolation via virtualization or containers, and provides economies of scale—users get access to large shared resource pools without needing to own or manage the underlying hardware.
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