Cloud Computing Definition
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Cloud computing is the on-demand delivery of computing resources, such as servers, storage, databases, networking, and software — over the internet, with pay-as-you-go pricing. Instead of buying and maintaining their own physical data centers and servers, organizations access these services on an as-needed basis from a cloud provider like AWS, Microsoft Azure, or Google Cloud, paying only for what they use. This model lets businesses provision resources in minutes, scale up or down instantly as demand changes, and trade large upfront hardware costs for lower, variable expenses, making it easier to innovate faster and deploy globally.
How does cloud computing work?
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Cloud computing works by delivering computing resources from a network of remote data centers owned and run by a third-party cloud service provider, rather than from your own hardware. When you use a cloud service, you're accessing those remote servers over the internet, the provider owns, manages, and maintains the physical infrastructure, while you simply consume the resources you need through a web browser or app. Because everything runs in the provider's data centers, you can provision resources in minutes, scale up or down instantly as demand changes, and pay only for what you use.
What are the types of cloud computing?
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Cloud computing is organized in two ways: by deployment model and by service model. The three deployment models are public cloud (resources delivered over the internet by a third-party provider), private cloud (built and used by a single organization for greater control and security), and hybrid cloud (a mix of both). The three main service models are IaaS (Infrastructure as a Service, virtualized servers, storage, and networking you manage), PaaS (Platform as a Service, a ready-made environment for developers to build and deploy apps), and SaaS (Software as a Service — fully managed applications you access over the web, like Microsoft 365).
What are the benefits of cloud computing for businesses?
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The main benefits of cloud computing are cost savings, scalability, speed, and flexibility. By moving to the cloud, businesses trade the fixed expense of buying and running data centers for variable, pay-as-you-go costs, and only pay for the resources they actually consume. They can scale resources up or down instantly to match demand, spin up new services in minutes rather than weeks, and deploy globally with just a few clicks. The cloud also frees IT teams from routine hardware maintenance so they can focus on higher-value work, and gives businesses fast access to innovative technologies like AI and analytics.