The public cloud model involves cloud resources owned and operated by third-party cloud service providers, delivered over the internet and available to anyone who wants to use or purchase them. Examples include AWS, Microsoft Azure, and Google Cloud Platform. On the other hand, private cloud infrastructure refers to cloud computing resources used exclusively by a single business or organization. It offers greater control and security. Thirdly, hybrid cloud infrastructures combine public and private clouds. This approach gives businesses greater flexibility and more deployment options by allowing workloads to move between private and public clouds as computing needs change.