PSC Networking & Host Connectivity Flashcards

Which NVMe-oF transport protocols does Pure Storage FlashArray support?

Answer: NVMe/TCP and NVMe/FC

FlashArray supports NVMe over Fabrics via both NVMe/TCP (over standard Ethernet) and NVMe/FC (over Fibre Channel), giving customers flexibility in transport choice.

In NVMe-oF deployments on Pure Storage FlashArray, what concept replaces the traditional SCSI LUN for addressing storage objects?

Answer: NVMe Namespace

NVMe-oF uses namespaces (identified by namespace IDs within an NVMe subsystem) instead of SCSI LUNs to address storage objects on the target.

What is the purpose of a Virtual IP (VIP) on a Pure Storage FlashArray iSCSI interface?

Answer: Providing a single stable IP endpoint for iSCSI targets that can float between controllers

A VIP floats between FlashArray controllers, providing a stable iSCSI target address that remains reachable even after a controller failover without reconfiguring host initiators.

Which Pure Storage CLI command displays all registered hosts and their associated WWN/IQN initiator identifiers?

Answer: purehost list

The 'purehost list' command outputs all configured host objects with their names, WWNs (FC), IQNs (iSCSI), or NQNs (NVMe-oF) registered on the array.

What Pure Storage recommended practice helps prevent Fibre Channel fabric congestion when connecting high-throughput FlashArray ports?

Answer: Provision adequate buffer-to-buffer credits and enforce QoS zoning policies

Pure Storage recommends configuring sufficient buffer-to-buffer credits on switch ports connected to FlashArray (which drives high bandwidth) and using QoS zoning to prevent congestion from impacting latency-sensitive workloads.

Which Pure Storage FlashBlade connectivity protocol is used for NAS (file) workloads?

Answer: NFS and SMB

FlashBlade serves NAS workloads over NFS (for Linux/Unix) and SMB (for Windows), providing high-throughput parallel file access across its distributed architecture.