<ul><li>Cloud computing is a model where organizations no longer need to buy and manage physical servers for their applications.</li><li>Virtualization is a technology that allows multiple applications to run on a single server, reducing cost and resource waste.</li><li>Public cloud allows anyone with an account to create instances without worrying about server location, while private cloud requires organizations to handle maintenance and management.</li><li>Hybrid cloud is a combination of public and private cloud services.</li></ul>

What is a cloud ?

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