What are the different types of Cloud Computing Service Models?
To achieve rapid provisioning of resources like networks, servers, storages, etc. Cloud is structured into three primary models, mainly–Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS).
Core Technologies Services, Inc. looks at these different models with respect to their features.
Infrastructure as a Service (IaaS)
In this model, a third party hosts hardware, software, applications and infrastructure elements needed for a business on behalf of its users. This type of cloud computing also undertakes maintenance of system backup and resiliency planning along with scalability and can be adjusted to meet on-demand workloads. Dynamic scaling, policy-based services, administrative tasks, desktop virtualization, etc. are some of the other characteristics of IaaS. IaaS model has low entry cost but a high investment for building and supporting the cloud infrastructure.
Platform as a Service (PaaS)
With PaaS model, the provider hosts the hardware and software on their own infrastructure and delivers applications on the Internet as a service to their clients. This model eliminates the need to install in-house hardware and software to run a new application and the user(s) can log in to start accessing the platform, generally via the internet. Charged on pay-per-use on a monthly basis, this model has auto-provisioning of underlying infrastructure with scalability, security, integration, deployment, etc.
Software as a Service (SaaS)
This model uses software distribution model in which a service provider hosts the applications via the Internet to a customer’s network. SaaS shares the characteristics of ASP and on-demand computing delivery models and provides easy administration, compatibility, automatic updates and global accessibility.
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