NVIDIA Certified Professional: AI Networking Practice Questions: AI Networking Architecture Domain

Correct Answer: B

Explanation: Adaptive routing dynamically balances the load across multiple paths, which is crucial for optimizing performance in InfiniBand networks. Increasing MTU size beyond standard values can lead to fragmentation, strict priority queuing can cause starvation of lower-priority traffic, and reducing active ports can decrease available bandwidth.

Correct Answer: B

Explanation: Implementing telemetry for real-time network analytics is an effective technique for monitoring and enhancing network performance in AI-driven environments. Telemetry provides insights into network traffic patterns, helping to identify and resolve performance bottlenecks. Option A is incorrect because disabling flow control can lead to packet loss. Option C is incorrect because reducing the number of active ports can limit scalability. Option D is incorrect because static routing lacks the flexibility needed for dynamic AI workloads.

Correct Answer: B

Explanation: Enabling Adaptive Routing is essential for optimizing performance and scalability in an InfiniBand network. It allows the network to dynamically adjust paths based on current traffic conditions, reducing congestion and improving throughput. Static IP addresses, while useful in some contexts, do not directly impact InfiniBand performance. Using a single subnet can limit scalability. Disabling QoS is not recommended as it can lead to unmanaged traffic flows.

Correct Answer: A

Explanation: Implementing network segmentation using VLANs is a recommended practice for enhancing security and ensuring compliance with data protection regulations. It isolates sensitive data and restricts access to authorized users only. Disabling logging, using default passwords, and allowing unrestricted access to management interfaces are insecure practices that can lead to unauthorized access and data breaches.

Correct Answer: B

Explanation: Leaf-Spine Architecture is the most suitable for large-scale AI training clusters because it provides predictable and low-latency connections between compute nodes. This architecture allows for equal cost paths and efficient bandwidth utilization, which is crucial for AI workloads that require high throughput and low latency. Star and Ring topologies are less scalable and can introduce bottlenecks, while Mesh topology, though providing redundancy, is complex and not as efficient for large-scale deployments.

Correct Answer: A

Explanation: Disabling unused ports on NVIDIA Spectrum-X switches is a simple yet effective security measure to prevent unauthorized access and reduce the attack surface of the network. Options B, C, and D do not enhance security and may not be relevant in the context of AI networking security.

Correct Answer: B

Explanation: The 'ibstat' tool is most effective for diagnosing link-level problems in InfiniBand networks. It provides detailed information about the state of InfiniBand ports and links, helping to identify connectivity issues. Option A (Ping) and Option C (Traceroute) are more suited for IP networks and do not provide specific InfiniBand link-level diagnostics. Option D (Netstat) is used for monitoring network connections and routing tables but is not specific to InfiniBand.

Correct Answer: A

Explanation: The Leaf-Spine architecture is ideal for minimizing latency in high-performance computing environments because it provides predictable and uniform latency, as each device is equidistant from one another. This is crucial for AI workloads that require fast data processing and minimal delay. Other architectures like Hub-and-Spoke, Ring, and Mesh introduce more complexity and potential for increased latency.

Correct Answer: B

Explanation: The primary purpose of a subnet manager in an InfiniBand network is to manage and optimize routing paths. It ensures efficient communication between nodes by dynamically configuring the network topology. Options A, C, and D are not functions of a subnet manager in InfiniBand networks.

Correct Answer: C

Explanation: Enabling subnet manager security is a best practice for securing InfiniBand networks. It ensures that only authorized nodes can join the network and participate in data exchanges, which is crucial for maintaining the integrity and confidentiality of AI workloads.