Free Dell EMC NCP-IB Exam Questions

Become Dell EMC Certified with updated NCP-IB exam questions and correct answers

Page: 1 / 48

Total 240 Questions | Updated On: Jul 30, 2025

Add To Cart

Question 1

What mechanism is primarily used in InfiniBand networks to control which nodes can join and communicate within a subnet?

A : InfiniBand relies on the physical topology of the network for access control, where only physically connected devices are able to communicate.

B : InfiniBand uses subnet access codes that must be manually configured on each node to authenticate them within the subnet.

C : Partition Keys (PKeys) are used to create partitions, and nodes are only allowed to communicate if they are assigned the same PKey, providing access control within the subnet.

D : The Subnet Manager uses Service IDs (SIDs) to identify and authenticate nodes, only allowing nodes with authorized SIDs to communicate.

Answer: C

Question 2

Which statement best describes the primary function of an InfiniBand router in a high-performance computing (HPC) environment?

A : The InfiniBand router connects different InfiniBand subnets, allowing for communication between devices across multiple subnets.

B : The InfiniBand router aggregates traffic from multiple endpoints and directs it to external networks, such as Ethernet or Fibre Channel.

C : The InfiniBand router controls congestion within a subnet by distributing traffic across multiple links based on load.

D : The InfiniBand router functions as a load balancer, distributing data streams evenly across endpoints within the same subnet.

Answer: A

Question 3

In the InfiniBand protocol stack, each layer plays a specific role in ensuring efficient data transfer and communication. Which of the following best describes the function of the data link layer in the InfiniBand protocol stack?

A : Establishes and maintains logical connections between applications and processes

B : Handles the physical transmission of data by converting bits into electrical or optical signals

C : Provides reliable point-to-point and multicast services, as well as error detection and correction

D : Implements flow control, congestion management, and ensures in-order delivery of messages

Answer: C

Question 4

You are configuring an InfiniBand-based high-performance computing (HPC) cluster for a scientific simulation workload that requires low latency and high throughput communication between nodes. The application is designed to leverage RDMA (Remote Direct Memory Access) to bypass the CPU and improve data transfer efficiency. You notice that while the latency is low, the throughput is not meeting expected levels. Which of the following is the most effective method to optimize RDMA performance for this application?

A : Enable CPU coalescing to allow RDMA to use more CPU resources

B : Ensure proper alignment of memory buffers to cache lines.

C : Increase MTU size on InfiniBand network interfaces

D : Disable flow control mechanisms for RDMA transfers

Answer: B

Question 5