Both carry RDMA at 400Gb/s; the decision is about loss behavior, tuning burden, and who operates it. A defensible recommendation with the conditions that flip it, the format this question is scored on.
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InfiniBand vs RoCE for a GPU training cluster, how do you choose?
Both carry RDMA at 400Gb/s; the decision is about loss behavior, tuning burden, and who operates it. A defensible recommendation with the conditions that flip it, the format this question is scored on.
Updated Aug 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.
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