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AWS .NET SDK
AWS Guide for .NET Developers

Cloud Deployment Models

There are three cloud deployment models : cloud, hybrid, and on-premises.

Cloud Deployment Model

A cloud-based application is fully deployed in the cloud, and all parts of the application run in the cloud. Applications in the cloud are either created in the cloud or are migrated from an existing infrastructure to benefit from cloud computing. Cloud-based applications can be built on low-level infrastructure pieces, or can use higher-level services that provide abstraction from the management, architecting, and scaling requirements of core infrastructure.

Hybrid Deployment Model

A hybrid deployment is a way to connect infrastructure and applications between cloud-based resources and existing resources that are not located in the cloud. The most common method of hybrid deployment is between the cloud and existing on-premises infrastructure to extend and grow an organization's infrastructure into the cloud, while connecting cloud resources to the internal system.

On-Premises Deployment Model

Deploying resources on-premises, using virtualization and resource management tools, is sometimes referred to as a "private cloud". On-premises deployment doesn't provide many of the benefits of cloud computing. However, it's sometimes sought for its ability to provide dedicated resources. In most cases this deployment model is the same as legacy IT infrastructure, while using application management and virtualization technologies to try and increase resource utilization.