Public, private, and hybrid clouds

There are three different types of cloud models: public, private, and hybrid.

The public cloud is based on the standard computing model in which a service provider makes resources such as virtual machines (VMs), applications, and storage available to customers over the internet. In the cloud computing model, a public cloud vendor provides on-demand availability of IT resources, such as the server, database, network, and storage, which organizations can use with secure web-based interfaces or through application programs over the internet. Public cloud services offer a pay-as-you-go model and, in most cases, the customer only pays for the services they are using for the duration of utilization, saving them costs by optimizing IT resources to reduce idle time.

You can think of the public cloud as an electric power supply model, where you switch on the light and pay only for the amount of electricity you use in units. You stop paying for it...