NVIDIA Certified Professional: AI Networking Practice Questions: InfiniBand Configuration Domain

Published: July 30, 2025 | 20 min read

Test your NVIDIA Certified Professional: AI Networking knowledge with 10 practice questions from the InfiniBand Configuration domain. Includes detailed explanations and answers.

NVIDIA Certified Professional: AI Networking Practice Questions

Master the InfiniBand Configuration Domain

Test your knowledge in the InfiniBand Configuration domain with these 10 practice questions. Each question is designed to help you prepare for the NVIDIA Certified Professional: AI Networking certification exam with detailed explanations to reinforce your learning.

Question 1

When configuring an InfiniBand switch, what is the purpose of setting the MTU size?

A) To control the number of devices that can connect to the switch

B) To determine the maximum packet size that can be transmitted

C) To manage the power consumption of the switch

D) To set the priority of data packets

Show Answer & Explanation

Correct Answer: B

Explanation: The MTU (Maximum Transmission Unit) size in an InfiniBand switch configuration determines the maximum packet size that can be transmitted over the network. This is crucial for optimizing performance and ensuring efficient data transfer. Options A, C, and D are not related to MTU size.

Question 2

What is the purpose of configuring Virtual Lanes (VLs) in an InfiniBand network?

A) To support multiple IP subnets

B) To prioritize traffic and manage Quality of Service

C) To provide network address translation

D) To enable multicast communication

Show Answer & Explanation

Correct Answer: B

Explanation: Configuring Virtual Lanes (VLs) in an InfiniBand network is used to prioritize traffic and manage Quality of Service (QoS). VLs allow different types of traffic to be separated and prioritized, improving network efficiency and performance. They are not used for IP subnets, NAT, or multicast communication.

Question 3

Which command would you use to verify the status of an InfiniBand port on a Linux system?

A) ibstatus

B) iblinkinfo

C) ibping

D) ibportstate

Show Answer & Explanation

Correct Answer: A

Explanation: The 'ibstatus' command is used to verify the status of an InfiniBand port, providing information such as the port state, link width, and link speed. 'iblinkinfo' is used to display link information, 'ibping' is for testing connectivity, and 'ibportstate' is used to change the port state.

Question 4

Which of the following is a necessary step when setting up an InfiniBand subnet manager?

A) Configuring link aggregation

B) Assigning unique Local Identifiers (LIDs) to each device

C) Enabling spanning tree protocol

D) Setting up VLAN tagging

Show Answer & Explanation

Correct Answer: B

Explanation: In InfiniBand networks, the subnet manager is responsible for assigning unique Local Identifiers (LIDs) to each device for proper communication. Link aggregation, spanning tree protocol, and VLAN tagging are not relevant to InfiniBand setup.

Question 5

In an enterprise AI setup, what is the primary purpose of configuring a Subnet Manager (SM) in an InfiniBand network?

A) To manage IP address allocation

B) To control network traffic at the application layer

C) To initialize and maintain the InfiniBand fabric topology

D) To encrypt data packets for security

Show Answer & Explanation

Correct Answer: C

Explanation: The primary purpose of configuring a Subnet Manager (SM) in an InfiniBand network is to initialize and maintain the fabric topology. The SM discovers the network topology, assigns LIDs (Local Identifiers), and ensures efficient routing within the fabric. It does not handle IP address allocation, application layer traffic control, or data packet encryption.

Question 6

What is the role of Subnet Manager (SM) in an InfiniBand network?

A) To manage IP address allocation

B) To configure and manage routing paths

C) To encrypt data between nodes

D) To provide DNS services

Show Answer & Explanation

Correct Answer: B

Explanation: The Subnet Manager (SM) in an InfiniBand network is responsible for configuring and managing routing paths, ensuring the efficient flow of data within the fabric. It does not manage IP addresses (A), provide encryption (C), or offer DNS services (D).

Question 7

What is the purpose of configuring Virtual Lanes (VLs) in an InfiniBand network?

A) To increase the physical bandwidth of the network

B) To isolate traffic for different applications

C) To provide redundancy in case of a link failure

D) To enhance security by encrypting data

Show Answer & Explanation

Correct Answer: B

Explanation: Virtual Lanes (VLs) are used in InfiniBand networks to separate traffic into different lanes, effectively isolating traffic for different applications and ensuring Quality of Service (QoS). This does not increase physical bandwidth, provide redundancy, or encrypt data, making options A, C, and D incorrect.

Question 8

What is the function of the 'Partition Key' (P_Key) in an InfiniBand network?

A) To encrypt data packets

B) To define membership in a virtual fabric

C) To manage bandwidth allocation

D) To configure network interfaces

Show Answer & Explanation

Correct Answer: B

Explanation: The 'Partition Key' (P_Key) is used in InfiniBand networks to define membership in a virtual fabric, allowing for traffic isolation and segmentation. It is not used for encryption (A), bandwidth allocation (C), or interface configuration (D).

Question 9

Which command is used to verify the status of InfiniBand interfaces on a host system?

A) ibv_devinfo

B) ibstatus

C) ifconfig

D) ibping

Show Answer & Explanation

Correct Answer: B

Explanation: The 'ibstatus' command is used to check the status of InfiniBand interfaces on a host system, providing information about the link state and other interface details. 'ibv_devinfo' (A) provides device information, 'ifconfig' (C) is used for Ethernet interfaces, and 'ibping' (D) is used to test connectivity between nodes in an InfiniBand network.

Question 10

In an InfiniBand network, what is the role of the 'partition key' (P_Key)?

A) To encrypt data over the network

B) To segregate traffic into virtual networks

C) To authenticate devices joining the network

D) To manage bandwidth allocation

Show Answer & Explanation

Correct Answer: B

Explanation: The partition key (P_Key) is used in InfiniBand to segregate traffic into virtual networks, allowing for isolated communication within the same physical network. It is not used for encryption, authentication, or bandwidth management.

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About NVIDIA Certified Professional: AI Networking Certification

The NVIDIA Certified Professional: AI Networking certification validates your expertise in infiniband configuration and other critical domains. Our comprehensive practice questions are carefully crafted to mirror the actual exam experience and help you identify knowledge gaps before test day.