NCP-AII Question 76
Select 3You are setting up a DGX system in a data center environment to support training large AI models. The network design requires a high-speed connection (200 Gbps) between the DGX server and the top-of-rack switch. Which of the following cable and transceiver combinations would be appropriate for this setup?
- A
QSFP56 transceiver with an active optical cable (AOC)
- B
QSFP56 transceiver with a direct attach copper (DAC) cable
- C
LC transceiver with a multimode fiber cable
- D
QSFP28 transceiver with a direct attach copper (DAC) cable
- E
QSFP56 transceiver with a multimode fiber cable using MPO connectors
Show answer and explanation
Correct answers: A, B, E
Explanation
For a 200 Gbps connection in a DGX system, QSFP56 transceivers are the appropriate choice as they support the required speed. Depending on the distance and environment, active optical cables (AOCs), direct attach copper (DAC) cables (for short distances), or multimode fiber cables with MPO connectors (for longer distances) can be used. QSFP28 transceivers and LC transceivers are not suitable as they do not support the required speed or configuration.
- A. Correct.
QSFP56 transceivers paired with active optical cables (AOCs) are commonly used for high-speed connections like 200 Gbps, especially for distances beyond the reach of DAC cables.
- B. Correct.
QSFP56 transceivers with direct attach copper (DAC) cables are suitable for high-speed connections like 200 Gbps, but they are typically used for short distances (less than 5 meters).
- C. Incorrect.
LC transceivers with multimode fiber cables are not suitable for 200 Gbps connections in this scenario, as they are typically used for lower-speed connections or legacy systems.
- D. Incorrect.
QSFP28 transceivers are designed for speeds up to 100 Gbps, making them unsuitable for the required 200 Gbps connection in this scenario.
- E. Correct.
QSFP56 transceivers with multimode fiber cables using MPO connectors are appropriate for high-speed connections like 200 Gbps, especially in modern data center setups.