Which Cisco-validated design (CVD) is built upon Cisco Unified Computing System, Nexus switches, and NetApp storage controllers?

FlexPod is the correct answer because it represents a pre-validated converged infrastructure solution that integrates Cisco Unified Computing System (UCS), Nexus switches, and NetApp storage controllers. This design provides a cohesive architecture that simplifies the deployment of IT infrastructure, while also ensuring scalability, reliability, and flexibility.

FlexPod combines the strengths of each component: Cisco's networking and computing capabilities, along with NetApp's storage solutions, creating a comprehensive platform that meets various business needs ranging from data center operations to cloud applications. Additionally, FlexPod facilitates streamlined management and reduce operational overhead, making it a popular choice among enterprises looking for robust and adaptable infrastructure solutions.

The other options refer to different technologies or solutions that do not align with the criteria mentioned in the question. HCI (Hyper-Converged Infrastructure) typically combines storage, computing, and networking but is not specifically tied to the Cisco and NetApp partnership. The E-Series focuses on a distinct family of storage systems designed for high-performance workloads, separate from the converged architecture of FlexPod. StorageGRID is a software-defined object storage solution that also does not incorporate the whole ecosystem described, particularly lacking the integration with Cisco UCS and Nexus switches.