700-905: Cisco HyperFlex for Systems Engineers

Answer: A, C, E The applicable HyperFlex read-cache configurations are write-back as the default mode, no caching for all-flash nodes because a dedicated read cache provides no benefit when persistent data is already on high-performance SSDs, and write-through as the VDI option. Cisco documents that hybrid nodes use a dedicated SSD read cache, whereas all-flash and all-NVMe configurations do not require one. **Learn more:** [Cisco HyperFlex 4.5 for Virtual Server Infrastructure with VMware ESXi](https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/UCS_CVDs/hx45_vmw_esxi.html)

Answer: B, D, E NVMe supports a large number of deep I/O queues, uses the PCIe interface for local NVMe storage, and has an efficient, streamlined command set that requires fewer CPU instructions per I/O operation. These characteristics improve parallelism and reduce host overhead. **Learn more:** [NVMe Overview](https://nvmexpress.org/wp-content/uploads/NVMe_Overview.pdf) · [NVM Express Base Specification](https://nvmexpress.org/specification/nvm-express-base-specification/)

Answer: A, C A HyperFlex Controller VM (CVM) supplies distributed storage services such as read/write handling, caching, deduplication, and compression. HyperFlex also combines local disks across cluster nodes into a shared distributed data platform instead of using traditional RAID to provide the storage layer. **Learn more:** [Cisco HyperFlex HX Data Platform White Paper](https://www.cisco.com/c/en/us/products/collateral/hyperconverged-infrastructure/hyperflex-hx-series/hyperflex-hx-data-platform-wp.html) · [Cisco HyperFlex Systems Solution Overview](https://www.cisco.com/c/en/us/products/collateral/hyperconverged-infrastructure/hyperflex-hx-series/solution-overview-c22-744674.html)