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A vendor offers 15 percent off if you take their Ethernet fabric instead of InfiniBand. Decide.

Compare complete fabric proposals on workload performance, support and total cost. Translate any measured regression into application impact before pricing the discount.

Updated Sep 2026 · Learn how AI infrastructure works through explanations, worked examples and diagrams, then practise applying it to interview questions.

Compare complete fabric proposals on workload performance, support and total cost. Translate any measured regression into application impact before pricing the discount.

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The concepts behind this question

Use these concept explanations to review the ideas behind this question.

🖧 Hardware & Cluster Build-Out

Scale-Out Fabric Choice: InfiniBand XDR vs Spectrum-XInfiniBand and Spectrum-X connect GPUs across nodes. Compare congestion behavior, topology and operational requirements as well as port speed.

🔌 Networking & StorageSign in

RDMA, InfiniBand and RoCEv2RDMA lets network adapters transfer data directly between registered memory regions. InfiniBand and RoCE provide different network and operating environments for those transfers.

🖧 Hardware & Cluster Build-Out

Colocation, Power Contracts and Site SelectionA suitable site must deliver the required rack power, cooling and service capacity. Contract terms and facility lead times shape both cost and deployment dates.

🖧 Hardware & Cluster Build-Out

The Bill of Materials for a Training ClusterA cluster bill of materials includes networking, storage, management, power, cooling and spares as well as GPUs. Size each from the workload and topology.

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UP NEXT ON YOUR JOURNEY

Next in this trackTwo thousand GPUs are being replaced. What do you do with the old ones?Next in this trackAn entire rack stops responding at 2 a.m. Walk me through the first thirty minutes.Closest to this topicA vendor claims their accelerator beats an H100 at half the price. How do you evaluate that?

FEDITOR'S NOTE

Look for equivalent scope, platform-specific congestion behavior, realistic pilots and correct cost arithmetic.

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