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Exam NCP-AII Topic 1 Question 91 Discussion

Actual exam question for NVIDIA's NCP-AII exam
Question #: 91
Topic #: 1
Consider an AMD EPYC-based server with 8 NVIDIAAIOO GPUs connected via PCle Gen4. You're running a distributed training job using Horovod. You've noticed that communication between GPUs is a bottleneck. Which of the following NCCL configuration options would be MOST beneficial in this scenario? (Assume all options are syntactically correct for NCCL).

Suggested Answer: C Vote an answer

Since the GPUs are connected via PCle, enabling peer-to-peer (P2P) transfers between GPUs is crucial for improving communication. enables this. specifies the network interface, which is relevant for network- based communication but less so when PCle is the primary interconnect. Disabling InfiniBand CNCCL 1B DISABLE=I s) would be detrimental if InfiniBand were available. specifies the InfiniBand host channel adapter, also irrelevant if not using InfiniBand. NCCL NET PLUGIN=none' disables network based communication which is incorrect.

by Calvin at Feb 03, 2026, 03:30 AM

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