When you run out of computer resources in your internal data center and expand to an external cloud on demand, this is an example of what?

The scenario described illustrates the concept of cloud bursting, which refers to a cloud computing strategy where an application runs on a private server in an internal data center but can 'burst' into the public cloud when additional resources are needed during peak demand. This approach allows organizations to manage unexpected spikes in resource needs without having to invest in permanent infrastructure, balancing cost and accessibility.

In contrast, SaaS (Software as a Service) involves delivering software applications over the internet, which does not directly relate to resource management. Hybrid cloud refers to a combination of on-premises private cloud and third-party public cloud services, which can provide these on-demand resources but does not specifically focus on the on-demand aspect when you run out of internal resources. Elasticity describes the ability to scale resources up or down as needed but does not inherently include the on-demand expansion into a public cloud context.

Thus, cloud bursting is the most accurate term for this situation, as it specifically addresses the method of extending resources beyond the internal data center by utilizing external cloud services during high-demand periods.