100% Free Dell EMC NCP-IB Practice Test Questions

Question 1

In InfiniBand, Virtual Lanes (VLs) are used to provide logical isolation of traffic within a single physical connection. What is the maximum number of Virtual Lanes supported by the InfiniBand standard, and what is their primary purpose?

A : 4 Virtual Lanes, used for low-latency traffic

B : 8 Virtual Lanes, used for data traffic prioritization only

C : 16 Virtual Lanes, with all used for data transmission

D : 15 Virtual Lanes, with one reserved for management traffic

Answer: D

Question 2

In InfiniBand, Virtual Lanes (VLs) are used to provide logical isolation of traffic within a single physical connection. What is the maximum number of Virtual Lanes supported by the InfiniBand standard, and what is their primary purpose?

A : 4 Virtual Lanes, used for low-latency traffic

B : 8 Virtual Lanes, used for data traffic prioritization only

C : 16 Virtual Lanes, with all used for data transmission

D : 15 Virtual Lanes, with one reserved for management traffic

Answer: D

Question 3

In InfiniBand, Virtual Lanes (VLs) are used to provide logical isolation of traffic within a single physical connection. What is the maximum number of Virtual Lanes supported by the InfiniBand standard, and what is their primary purpose?

A : 4 Virtual Lanes, used for low-latency traffic

B : 8 Virtual Lanes, used for data traffic prioritization only

C : 16 Virtual Lanes, with all used for data transmission

D : 15 Virtual Lanes, with one reserved for management traffic

Answer: D

Question 4

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 5

Which of the following best describes how RDMA (Remote Direct Memory Access) operations work within the InfiniBand protocol stack?

A : RDMA bypasses the CPU and operating system on the data path, allowing data to be directly transferred between the memory of two systems, reducing CPU overhead and improving data throughput.

B : RDMA allows memory access directly from one host’s CPU to another host's memory without any involvement of the memory controller, reducing latency.

C : RDMA only works over the physical layer of the InfiniBand stack and requires additional middleware to handle data transfer at the transport layer.

D : RDMA requires the intervention of the OS kernel in both the sending and receiving systems, as it relies on kernel space memory buffers for transferring data between nodes.

Answer: A

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