High-Density Cabling Installation
Free NVIDIA-Certified Professional: AI Rack and Interconnect practice — 6 questions on High-Density Cabling Installation, with explanations. No sign-up. Full 12-question mixed test →
A technician must connect two NVLink Switch trays located 150 meters apart in a large-scale GB200 NVL72 SuperPOD deployment, spanning across two rows of the data center. Which cabling solution BEST meets this requirement?
Single-mode fiber with LR/FR transceivers supports reaches well beyond 100m (typically up to several kilometers), making it the only option in the list capable of reliably spanning a 150m run at NDR speeds.
A rack pair sits directly adjacent within the same NVL72 pod, requiring a 2-meter NDR (400Gb/s) InfiniBand link between leaf switches. To minimize power draw and cost while following NVIDIA's supported cabling guidance, which cable type should be selected?
At a 2m reach, passive copper DAC fully supports NDR speeds without the added power consumption or cost of active electronics or optics, making it the correct choice for short adjacent-rack links.
During cable dressing in a high-density GB200 NVL72 rack, what is the minimum bend radius that must be maintained for InfiniBand copper and fiber cabling to avoid signal degradation or physical damage, per NVIDIA cabling guidance?
NVIDIA cabling guidance specifies a minimum bend radius of approximately 30 mm for high-density copper and fiber cabling to prevent attenuation increases, connector stress, and physical damage.
While installing 72 NDR cables into a GB200 NVL72 rack, a technician routes all cables down the left side of the rack to save time, resulting in a cable bundle that partially blocks front-door airflow and exceeds the tray's rated fill capacity on that side. What should the technician do to correct this installation per NVIDIA best practice?
The 50/50 left-right routing strategy evenly distributes cable volume and weight across both trays, preventing airflow obstruction and avoiding overfilling any single tray, which is the documented best practice for high-density racks.
Which statement correctly differentiates APC and UPC fiber-optic connector polish types as used in high-density MPO cabling deployments?
APC (Angled Physical Contact) connectors use an 8-degree angled ferrule polish, are color-coded green, and reduce back reflection, while UPC (Ultra Physical Contact) connectors use a flat polish and are color-coded blue.
Before mating an MPO/APC fiber connector during a GB200 NVL72 InfiniBand cabling installation, a technician wipes the ferrule end-face with an isopropyl-alcohol-soaked cloth and immediately connects it. Link testing later shows elevated BER on that link. What was most likely done incorrectly?
Proper procedure requires an inspect-clean-inspect cycle using a fiber-optic microscope or scope to confirm the end-face is free of residue or contamination before mating; skipping this verification step allows undetected debris to cause elevated BER.
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