Cloud computing has become an integral part of IT infrastructure for businesses of all sizes, providing on-demand access to a wide range of services and resources. The evolution of cloud computing has been driven by the need for more efficient, scalable and cost-effective ways to deliver computing resources.
Cloud computing enables on-demand access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications and services) over the internet. Instead of owning and maintaining physical hardware and infrastructure, users can leverage cloud computing services provided by third-party providers.
Cloud service and deployment models
Cloud computing is commonly categorized into service and deployment models:
Service models
Infrastructure as a Service (IaaS): Provides virtualized computing resources over the internet. Users can rent virtual machines and storage and networking components.
Platform as a Service (PaaS): Offers a platform that includes tools and services for application development, testing and deployment. Users can focus on building applications without managing the underlying infrastructure.
Software as a Service (SaaS): Delivers software applications over the internet on a subscription basis. Users access the software through a web browser without worrying about installation or maintenance.
Deployment models
Public cloud: A third-party cloud service provider owns and operates resources and makes them available to the general public. Some providers include Amazon Web Services (AWS), Microsoft Azure and Google Cloud Platform.
Private cloud: A single organization exclusively uses resources. Either the organization or a third-party provider can manage the infrastructure, which can be located on-premises or off-site.
Hybrid cloud: Combines public and private cloud models to allow data and applications to be shared between them. ..
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