Characteristics of the cloud

According to NIST:

On-demand self-service: Can provision capabilities as needed, without needing human interaction
Broad Network Access: Available over the network and accessed through standard mechanisms (like http)
Resource Pooling: No control or knowledge of the exact location of the resources. Resources are pooled to serve multiple consumers using a multi-tenant model
Rapid Elasticity: Capabilities can be elastically provisioned and released rapidly, to keep up with demand.
Measured Service: Resource usage can be monitored, controlled, reported, & BILLED

This section was summarised by Adrian Cantrill

Cloud service models

I recently learnt that a hybrid cloud is more like:

AWS Outposts
Google Anthos Private on prem isn’t just bare metal servers, it has to meet the characteristics that describe the public cloud as seen above
Azure has really good docs on this topic

Sometimes referred to as internal or corporate cloud.