Assume that a cloud network provider uses network resource pooling in which elements of all of the resource pools remain well$-$connected with each other to facilitate better cloud service at the provider's end. What is offered to consumers by the cloud service provider with the use of network pooling? Select the appropriate option from the given choices.

Small required portion of centralized storage disk to virtual machines

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srira

Collection of physical servers that are networked together

Nested sub$-$pool architecture makes pool free of any single point of failure

Physical networking devices in virtualized mode for building their own virtual network