The public cloud is available to the general public for systems and services. Public clouds can be safer than they are because of being open.
Private cloud enables access to organization’s systems and services. It’s safer because of its peculiar nature.
Community Clouds provide systems and services for a number of organizations.
Hybrid cloud is a mixture of public and private clouds that performs a critical cloud of the cloud when performing non-critical activities in the public cloud.
Cloud computing is based on service models. These are divided into three basic service models.
- Infrastructure as a service (IaaS)
- Platform as a Service (PaaS)
- Software as a service (SaaS)
XaaS (Anything-as-a-Service) is another service model that includes the network as a service, the activity as a service, the identity as a service, the database as a service, or The strategy. as a service. Infrastructure as a Service (IaaS) is the most basic level of service. Each service model inherits the underlying model’s security and management mechanism, as shown in the following figure:
IaaS provides access to basic resources such as physical machines, virtual machines, virtual storage, and so on.
PaaS provides the runtime environment for applications, development and deployment tools, and more.
The SaaS model allows the use of software applications as a service for end users.