Domain 1 of the Certificate of Cloud Security Knowledge (CCSK) lays the foundation for understanding cloud computing and its underlying architectural principles. This domain introduces the essential characteristics, service models, and deployment models defined by the National Institute of Standards and Technology (NIST), which are widely accepted across the industry. The focus of this domain is to help learners develop a solid grasp of what cloud computing is, how it differs from traditional IT environments, and how various components such as virtualization, multi-tenancy, and resource pooling contribute to the cloud delivery model. It also examines the roles and responsibilities of cloud service providers and consumers, as well as the shared responsibility model, which is critical for understanding how security is managed in cloud environments.
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