You are standing up an NVIDIA DGX system for enterprise production.

The correct sequence is to complete physical installation and cabling, power on the DGX system, update firmware and drivers, run full health and stress diagnostics, review GPU and system logs, and validate GPU accessibility before production release. Enterprise DGX deployment requires layered validation. Physical cabling, power, and cooling must be correct before software validation is meaningful. Firmware and driver versions must be aligned so that GPUs, NVSwitch, network adapters, BMC, and management tools operate in a supported state. NVSM health checks and stress diagnostics are important because they can detect platform issues such as storage alerts, power supply faults, fan problems, thermal problems, or hardware instability. GPU accessibility should be verified with NVIDIA tools before users are allowed to run production workloads. Option A is too weak because it exposes users before full diagnostics are complete. Option C focuses on network identity but ignores hardware stress validation. Option D delays stress testing until routine operations, which is exactly how early-stage failures can be missed. A production-ready DGX system should be validated before user workloads depend on it.