Nutanix NCS-Core Exam Practice Test Instant Access

Question 1

A consultant is deploying a new Nutanix cluster. The nodes have the following network interfaces.

2x 10G NICS

2x 25G NICS

The consultant is using the default virtual switch configurations for AHV. After creating 10 VMs, the consultant observes inconsistent network speeds from the VMs on the AHV host.

What should the consultant do to resolve this issue?

AConfigure load balancing on the virtual switch for both 106 and 25G interfaces.

BConfigure a separate virtual switch with 10G NICs on vs o and 256 NICs on vs.

CConfigure Active/Backup for both the 10G and 25G interfaces.

DConfigure all network interfaces with LACP on the same virtual switch.

Answer : D

To resolve inconsistent network speeds from the VMs on an AHV host equipped with both 10G and 25G NICs, the consultant should configure all network interfaces with Link Aggregation Control Protocol (LACP) on the same virtual switch. This configuration will allow for better load balancing and bandwidth aggregation across multiple network interfaces, improving overall network throughput and reducing bottlenecks. Reference:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Networking chapter (https://www.nutanixbible.com/)

Question 2

Refer to the exhibit.

Which IP addresses can be configured for the Foundation VM and Consultant Laptop?

AFVM: 10.170.25.15/24, Laptop: 10.170.25.16/24

BFVM: 10.170.1.2/20, Laptop: 10.170.1.12/20

CFVM: 10.170.16.15/20,: 10.170.16.16/20

DFVM: 10.170.25.2/24, Laptop: 10.170.25.12/24

Answer : D

Based on the subnet assignments from the exhibit provided, the Hypervisor Management IP addresses fall within the 10.170.0.5, 10.170.0.6, 10.170.0.7 range with a subnet mask of 255.255.240.0, indicating a /20 subnet. However, the Foundation VM (FVM) and the Consultant Laptop should ideally be on the same subnet as the Controller Virtual Machine (CVM) to facilitate easy access and management. The CVM IP addresses indicated are 10.170.0.4, 10.170.0.9, and 10.170.0.10 with subnet 255.255.240.0 (/20). Thus, the appropriate choice for the FVM and Laptop that matches the subnet without overlapping with existing IPs and allows network configuration without conflicts would be in the same /24 range as suggested in option D, i.e., FVM: 10.170.25.2/24, Laptop: 10.170.25.12/24.

Nutanix Networking and Foundation Setup Guidelines

Question 3

A consultant deploys a new ESXi-based Nutanix cluster and migrates a sphere deployment to the cluster, After completing the deployment, the customer states they are experiencing VM performance issues.

Upon observing logs and performance data, the consultant identified the following symptoms.

Excessive read/write 1/Os on CVMs

Excessive Motion of VMs

What is causing this issue?

ASphere cluster DRS migration threshold is set to Conservative.

BDRS is in use and the cluster is configured to use Erasure Coding.

CDRS is in use and the cluster is configured to use Deduplication.

DSphere cluster DRS migration threshold is set to Aggressive

Answer : D

The customer is experiencing VM performance issues characterized by excessive read/write I/Os on CVMs and excessive motion of VMs due to the Distributed Resource Scheduler (DRS) in an ESXi-based Nutanix cluster. This is likely caused by the DRS migration threshold being set to Aggressive, which leads to frequent rebalancing of workloads across the cluster, causing high I/O and VM motion. Adjusting this setting to a less aggressive level can help reduce unnecessary VM motions and stabilize performance. Reference: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

Question 4

Where in the Support Portal can it be determined if a version of AOS is supported on a particular hardware platform.

ASolution Documentation

BUpgrade Paths

CHardware Compatibility Lists

DCompatibility and Interoperability Matrix

Answer : D

To determine if a version of Acropolis Operating System (AOS) is supported on a specific hardware platform, the 'Compatibility and Interoperability Matrix' section of the Nutanix Support Portal should be consulted. This resource provides detailed information on supported hardware for different AOS versions, ensuring that all components are compatible and supported for optimal operation. Reference: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

Question 5

During Foundation, all nodes are imaged successfully. The cluster creation step fails. The consultant troubleshoots the issue and verifies that all Hosts and CVMs are up and running and responding to network pings.

Which method should the consultant select to create the cluster?

ALog into one of the hosts and run the cluster create command.

BImage the Bare Metal nodes.

CLog into one of the CVMs and run the cluster create command.

DFactory reset the nodes and re-start the Foundation process.

Answer : C

After confirming that all nodes (Hosts and CVMs) are operational and network accessible, the next step in troubleshooting a failed cluster creation process is to use one of the CVMs to manually initiate the cluster creation. This is done using the command cluster create from a CVM, which allows you to establish the cluster management and data services provided by Nutanix. This approach is recommended when the Foundation process has successfully imaged the nodes but the automatic cluster creation has failed. Reference:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Cluster Initialization chapter (https://www.nutanixbible.com/)

Question 6

From a hypervisor, which IP address should the consultant use to connect to the locally tossed on?

A192.168.5.254

B172.16.19.2

C10.100.5.5

D192.168.1.254

Answer : A

When configuring network settings for a hypervisor or accessing local services hosted on it, the IP address must be reachable from the network configuration you are currently using. Given the generic nature of the options, the correct choice typically depends on the subnet used for management purposes, which often uses a standard private address. '192.168.5.254' is a common choice for local network configurations and is likely set up as the gateway or a primary network interface on the hypervisor. Reference:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Network Configuration chapter (https://www.nutanixbible.com/)

Question 7

A consultant is planning to use a flat switch for installation.

What is the network requirement for Foundation VM, CVM, Hypervisor, and IPMI

AFoundation VM, CVM, and Hypervisor must be on the same subnet. IPMI can be on a different subnet.

BCVM, Hypervisor, and IPMI must be on the same subnet. Foundation VM can be on a different subnet.

CFoundation VM and CVM must be on the same subnet. Hypervisor and IPMI can be on a different subnet.

DFoundation VM, CVM, and IPMI must be on the same subnet. Hypervisor can be on a different subnet.

Answer : A

In a typical Nutanix deployment using a flat switch, the Foundation VM, the CVM, and the Hypervisor should all be on the same subnet to facilitate seamless communication and management operations during the initial setup and operation. The IPMI, being a management interface, can be on a different subnet as it serves a different purpose primarily for remote management at the hardware level and does not need to be on the same subnet as the other components for cluster functionality. Reference:

Nutanix University - NCS-Core 6.8 Learning Path

The Nutanix Bible, Network Configuration chapter (https://www.nutanixbible.com/)

Nutanix NCS-Core Nutanix Certified Services Core Infrastructure Professional Exam Practice Test