Which of the following types of storage do cloud infrastructure services use?

Cloud infrastructure services primarily use volume storage, which refers to block storage that allows users to provision and manage storage resources that can be attached to virtual machines. Volume storage is highly flexible and scalable, making it suitable for a variety of applications, including databases and enterprise applications that require high performance and low latency.

Volume storage can be thought of as a virtual hard drive that is independent of the virtual machine’s lifecycle, allowing users to detach and reattach storage as needed. This capability is crucial in cloud environments, where resources are dynamically allocated based on demand. It provides both the performance needed for intensive workloads and the ease of management required in a cloud context.

While structured, unstructured, and content and file storage play important roles in data handling, they do not specifically capture the essence of the storage solutions provided by cloud infrastructure services in terms of performance and integration with virtual machines. Thus, volume storage accurately represents a core element of cloud storage capabilities.