Cloud Service Models
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Software as a Service (SaaS)
Software is provided as a service. Access is charged as per subscription basis at price per user. Used for non-core applications such as CRM, HR or PROC.
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Platform as a Service (PaaS)
Complete development and deployment environment in the cloud, enabling delivery from simple cloud-based apps to sophisticated enterprise applications.
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Infrastructure as a Service (IaaS)
Outsourced equipment including storage, hardware, servers, and networking. IaaS provider owns the equipment with virtual machine power allocation.
Deployment Models
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Hybrid Cloud
Combination of dedicated and cloud solutions, establishing IT landscape with optimal balance of convenience and security.
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Managed Cloud
Resources dedicated to one customer, managed by provider, accessed by VPN. Built on top of Private cloud with dedicated hardware.
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Private Cloud
Resources dedicated to one customer, managed by customer/third party. Located on-premise to mitigate data security issues.
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Public Cloud
Access to provider applications running on cloud. Shared by multiple customers, reducing overall IT infrastructure costs.