4.3 Describe High-Performance Network Enabling Technologies for AI in Data Center Infrastructure 350-601 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the role of Enhanced Transmission Selection (ETS) in a DCB-enabled network?

   • AIt encrypts traffic to ensure confidentiality.
   • BIt provides redundancy by creating multiple paths.
   • CIt automatically configures VLANs.
   • DIt provides bandwidth allocation and prioritization among different traffic classes.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What is the role of Priority Flow Control (PFC) in a lossless Ethernet network?

   • AIt prevents packet loss by pausing traffic on a specific priority class when congestion occurs.
   • BIt encrypts traffic to ensure data integrity.
   • CIt prioritizes control plane traffic over data plane traffic.
   • DIt drops low-priority packets to protect high-priority traffic.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A company is building a new AI data center with 128 GPU servers. The network architect must choose a topology that scales to thousands of servers while maintaining consistent low latency and high bisection bandwidth for all-to-all communication patterns used in distributed training. The architect also wants to avoid oversubscription at any layer. Which topology should be selected?

   • AA three-tier hierarchical topology with 4:1 oversubscription at the core
   • BA leaf-spine topology with a 1:1 oversubscription ratio
   • CA mesh topology where each switch connects to every other switch
   • DA hub-and-spoke topology with a central core switch
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A data center team is designing a network for a new GPU cluster that will run distributed training of large language models. The training jobs periodically synchronize gradients across all GPUs, creating synchronized bursts of traffic that can saturate links. The team must select a topology that provides multiple equal-cost paths between any two servers to handle these bursts without creating hotspots. Which topology best meets this requirement?

   • AA collapsed-core topology where all servers connect to a single pair of core switches
   • BA spine-leaf topology with all links active and equal-cost multipath (ECMP) enabled
   • CA ring topology connecting all top-of-rack switches in a loop
   • DA traditional three-tier hierarchical topology with oversubscription at the core
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the role of communication libraries (e.g., NCCL) in distributed AI training?

   • AThey encrypt the model weights.
   • BThey optimize the communication patterns between GPUs.
   • CThey automatically scale the network bandwidth.
   • DThey provide a web interface for managing training jobs.
   Reveal Solution Discussion Select an answer first