Computing architecture with metered, on-demand resources and high availability, billed by usage.

Computing architecture with metered, on-demand resources and high availability, billed by usage.

• A. SaaS
• B. Platform as a Service (PaaS)
• C. Cloud computing
• D. Anything as a Service (XaaS)

Answer: (C)

Cloud computing is the model that provisions computing resources on demand over a network, with metering and pay-as-you-go pricing and options for high availability. The description—metered, on-demand resources and high availability, billed by usage—captures the core characteristics of cloud computing: you can scale resources up or down as needed, you’re charged based on actual usage, and the infrastructure is designed to be reliable through redundancy. SaaS refers to delivering software over the internet to users, which is a specific service model rather than the overall architecture. PaaS provides a platform for developers to build and deploy applications, focusing on the environment rather than the general resource provisioning model. XaaS (Anything as a Service) is a broad umbrella term that includes various service models, but the best fit for the description of metered, on-demand resources and pay-per-use billing is cloud computing, since it describes the overarching architecture and consumption model.

Cloud computing is the model that provisions computing resources on demand over a network, with metering and pay-as-you-go pricing and options for high availability. The description—metered, on-demand resources and high availability, billed by usage—captures the core characteristics of cloud computing: you can scale resources up or down as needed, you’re charged based on actual usage, and the infrastructure is designed to be reliable through redundancy.

SaaS refers to delivering software over the internet to users, which is a specific service model rather than the overall architecture. PaaS provides a platform for developers to build and deploy applications, focusing on the environment rather than the general resource provisioning model. XaaS (Anything as a Service) is a broad umbrella term that includes various service models, but the best fit for the description of metered, on-demand resources and pay-per-use billing is cloud computing, since it describes the overarching architecture and consumption model.