Which of these is an example of a public cloud service?

AWS Elastic Compute Cloud (EC2) is an example of a public cloud service because it is a service offered by Amazon Web Services that allows users to rent virtual computers in the cloud. These instances can be accessed over the internet, enabling users to scale their computing resources according to their needs without investing in physical hardware.

Public cloud services, like AWS EC2, are characterized by their multi-tenant architecture, where resources are shared among multiple customers. This model allows for greater flexibility, scalability, and cost-effectiveness, as users only pay for what they consume. Public cloud services are managed by third-party providers and typically have high availability and reliability.

The other options represent different cloud models or configurations that do not fit the definition of a public cloud service. A private dedicated server refers to resources that are exclusively available for one organization, while a hybrid cloud configuration combines both public and private cloud elements. An on-premises data center implies that the infrastructure is managed internally by an organization rather than being provided over the internet by a third-party vendor.