Cloud Deployement Modules

Cloud deployment models

Today, there are three mainstream methods for consuming cloud services:

• Public cloud: Cloud started out as a public, multi-tenant service similar to the electricity utility model. Public clouds enable you to tap into a pool of shared resources and pay only for the resources you actually consume. You don’t need to know where or how the services are created.
• Private cloud: Private clouds offer similar capabilities to public clouds, but they run on dedicated IT only. The private cloud evolved to support companies that needed tighter control over their data and processes. As a private-cloud consumer, you don’t share the underlying IT with any other company.
  Many companies build private clouds on company property to ensure all the transactions take place behind the company firewall. Some companies host their private clouds on dedicated, third-party IT. Either way, as long as the IT, applications and data are not shared, companies can maintain strict IT controls and satisfy compliance regulations.
• Hybrid cloud: Hybrid clouds combine private and public cloud services to offer the security of private clouds and the enormous scalability of public clouds. You can use them to port data and applications between clouds.