Nutanix NCS-CORE Online Practice Questions and Exam Preparation

Nutanix NCS-CORE Online Questions & Answers

• Question 281:

  An administrator inherits a new Nutanix environment and logs in to a CVM to check the network configuration. The configuration is as follows:

  

  Which action should the administrator take to improve network performance?

  A. Configure VLAN tagging both on br0 and br1 and their physical interfaces.
  B. Add eth0 and eth1 to the br0-up bond
  C. Configure balance-sib or balance-tcp mode for br0-up if switch configuration allows
  D. Remove one 10 Gbs interface from br0-up to make sure all 10 Gbs can be used.
  C. Configure balance-sib or balance-tcp mode for br0-up if switch configuration allows

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  Explanation/Reference:

  Upon reviewing the network configuration in the provided image and considering the setup in a Nutanix environment, the best action to improve network performance is to adjust the bonding mode for the bridge that includes multiple high-

  bandwidth interfaces.

  Option C, "Configure balance-sib or balance-tcp mode for br0-up if switch configuration allows," is the most effective choice. The bonding mode "balance-sib" (source IP-based load balancing) or "balance-tcp" (TCP/IP layer balancing) can

  optimize the distribution of network traffic across multiple interfaces, thereby enhancing throughput and redundancy.

  This approach utilizes the capabilities of multiple network interfaces more efficiently, distributing the load to prevent any one interface from becoming a bottleneck while providing failover redundancy. References:This configuration strategy

  aligns with best practices for network setup in high-performance virtualized environments, as detailed in Nutanix's networking configuration guides and the Nutanix Bible, ensuring optimal performance and reliability.

• Question 282:

  In which two ways can the IPMI address be set on a Nutanix hardware installation? (Choose two.)

  A. Nutanix Network Crashcart
  B. iLO configuration utility
  C. BIOS configuration
  D. ipmitool
  C. BIOS configuration
  D. ipmitool

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  BIOS configuration: Access the BIOS settings during boot-up to manually configure the IPMI address directly on the hardware.

  ipmitool: Use the ipmitool command-line utility to configure the IPMI address from a remote session or script, which provides a way to automate or manage IP settings without needing physical access to the BIOS.

  References:

  Nutanix Bible (https://www.nutanixbible.com), particularly the sections on hardware installation and IPMI settings.

  Nutanix University: NCS-Core 6.8 Training (https://university.nutanix.com), detailing tools and techniques for IPMI configuration.

• Question 283:

  A customer recently set up Async Replication between Site A and Site B. The customer wants to conduct a planned failover and clicks Activate on Site B.

  The customer then runs the following command on Site A:

  ncli pd deactivate_and__destroy_vms name=

  What does this do to the customer environment?

  A. VMs get deleted from Site B. and the protection domain is now Active.
  B. VMs are powered off on Site A and must be manually powered on at Site B.
  C. VMs get deleted from Site A and the protection domain is no longer active.
  D. Customer must then manually power off VMs at Site A and power them on at Site B.
  C. VMs get deleted from Site A and the protection domain is no longer active.

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  Explanation/Reference:

  The command ncli pd deactivate_and__destroy_vms name= is a critical operation in managing Nutanix environments, particularly in scenarios involving disaster recovery and replication. This command deactivates the protection domain and deletes all VMs associated with that protection domain from the source site (Site A in this case). This operation is generally part of a planned migration or failover process where the VMs are intended to be run from the remote site (Site B). After this operation, the protection domain at Site A is no longer active, meaning it has been effectively removed along with its associated VMs, thus clearing the way for Site B to take over operations without conflict from the original site. References:This action and its implications are covered under Nutanix disaster recovery and high availability strategies, detailed in both the Nutanix Bible and official Nutanix NCS-Core training materials, which discuss the management of protection domains and replication processes. https://portal.nutanix.com/page/documents/details?targetId=Web-Console-Guide-Prism-v5_10:wc-protection-domain-failback-disaster.html

• Question 284:

  A customer has requested that a consultant create a Disaster Recovery Test for their new Nutanix environments.

  What should the consultant include in a custom plan to validate VM availability across the network?

  A. Assign backup policies to source VMs.
  B. Verify VMs received correct IP address after failover.
  C. Ensure NTP configuration active.
  D. Sign into VM console using local credentials.
  B. Verify VMs received correct IP address after failover.

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  Explanation/Reference:

  For creating a Disaster Recovery Test plan for Nutanix environments, verifying that VMs receive the correct IP address after a failover is critical to validate VM availability across the network. This check is essential to ensure that network configurations and DHCP/Static IP settings are correctly applied post-failover, enabling proper network communications and access to services hosted on the VMs. Ensuring correct IP addressing is fundamental to the successful operation of DR strategies in virtualized environments.References: Nutanix Disaster Recovery Best Practices, Nutanix Network Configuration for DR environments.

• Question 285:

  Refer to the exhibits.

  

  A consultant is trying to test port failover on the node shown in the first exhibit. A continuous ping test is performed to the host. The consultant shuts down one of the links, after which the host ping request times out. The consultant tries to troubleshoot the issue with the customer and sees the information shown in the second exhibit on their Cisco Switches:

  

  What is causing the issue?

  A. There is a Native VLAN mismatch on the switchport.
  B. The wrong VLAN is tagged on the host.
  C. Bad SPF+ cables are on the active interface.
  D. PortFast is not enabled on the port connected to the host.
  A. There is a Native VLAN mismatch on the switchport.

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  Explanation/Reference:

  In the scenario where a consultant observes ping timeouts after shutting down one of the links during a port failover test, the issue is likely due to a Native VLAN mismatch on the switchport. The configuration settings shown in the second exhibit indicate different native VLANs for the switch ports connected to the Nutanix node. This mismatch can cause connectivity issues when one of the links is down, as VLAN tagging inconsistencies prevent proper fallback and routing of traffic.References: Cisco Networking Troubleshooting Guide, Nutanix Network Configuration Best Practices.

• Question 286:

  A customer has an ESXi cluster with two 10GbE NICs on each node and the following requirements.

  1.

  Solution must follow Nutanix Best Practices

  2.

  Network configuration should be redundant

  3.

  A vSphere Distributed Switch will be utilized Which load balancing configuration should be used?

  A. Route based on IP hash
  B. Route based on source MAC hash
  C. Route based on originating port ID
  D. Route based on physical NIC load
  A. Route based on IP hash

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  Explanation/Reference:

  For a customer using an ESXi cluster with two 10GbE NICs on each node and a vSphere Distributed Switch, the recommended load balancing configuration, following Nutanix Best Practices for redundancy and efficiency, is "Route based on IP hash." This setting allows for optimal utilization of network bandwidth and redundancy by distributing the traffic based on the IP address pairings, ensuring a balanced load across the physical NICs. References: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

• Question 287:

  A consultant is preparing to add new nodes into an existing cluster. The current cluster AOS version is 5.8. The new expansion node is currently running AOS 5.9 code. The cluster must continue to run at its current AOS version.

  Which method can be used to successfully add the node?

  A. Upgrade the cluster to 5.9 and add the node through Prism Element.
  B. Use Prism Element to Expand the cluster and select the re-image option.
  C. Use the CLI and enter cluster add-node node-serial="node_serial".
  D. Use Prism Element, which will downgrade the node by default during the node add process.
  B. Use Prism Element to Expand the cluster and select the re-image option.

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  Explanation/Reference:

  When adding a new node with a higher AOS version (5.9) into an existing cluster running an older version (5.8), the recommended method is to use Prism Element to expand the cluster and select the re-image option. This process involves

  re-imaging the new node to the AOS version currently running in the cluster (5.8), ensuring compatibility and stability across the cluster without requiring an overall upgrade to a newer version. This approach maintains the cluster's operational

  integrity while integrating the new hardware.References:

  Nutanix Bible, NCS-Core 6.8 official training materials, and Nutanix support documentation on cluster expansion.

• Question 288:

  A customer has a mail server and needs Nutanix to send email notifications about errors that might occur in Prism. The following information is included under SMTP Server Settings

  1.

  IP Address of mail server

  2.

  Port Security Mode

  3.

  From email address

  What should the consultant set up before arriving onsite?

  A. SMTP server to allow emails from all IPs in customer network
  B. SMTP server to allow emails from Cluster VIP and CVM IP addresses
  C. SMTP to allow emails from Cluster VIP
  D. SMTP server to allow emails from Host IP addresses
  B. SMTP server to allow emails from Cluster VIP and CVM IP addresses

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  Explanation/Reference:

  Before arriving onsite, the consultant should set up the SMTP server to allow emails from both the Cluster Virtual IP Address (VIP) and the Controller Virtual Machine (CVM) IP addresses. This setup ensures that Prism can successfully send email notifications through the customer's mail server about any errors or notifications generated by the Nutanix environment, as both the Cluster VIP and CVM IPs are sources from which Prism sends alerts.References: Nutanix Bible, Nutanix University NCS-Core 6.8 learning materials

• Question 289:

  An administrator is performing a set of routine checks and notes that Prism Central is running with 4 vCPUs and 21 GB RAM. The organizations environment is based on two Nutanix clusters with 170 VMs plus a Legacy vSphere infrastructure. No manual changes have been done on Prism Central VM.

  Which configuration justifies the current Prism Central configuration?

  A. Nutanix Move is running on Prism Central to import VMs from the Legacy Cluster.
  B. Prism Central was installed for Large Deployment environments.
  C. Prism Central is running on the legacy duster and requires more RAM.
  D. Nutanix Leap and Nutanix Flow have been enabled on Prism Central
  D. Nutanix Leap and Nutanix Flow have been enabled on Prism Central

• Question 290:

  An administrator receives reports about a Nutanix environment. The investigation finds the following;

  1.

  VMs are experiencing very high latency

  2.

  Each node is equipped with a single SSD, utilized at 95%

  3.

  Each node is equipped with three HDDs, utilized at 40% Why are the guest VMs experiencing high latency?

  A. CVMs are overwhelmed by disk balancing operations.
  B. All VM write operations are going to HDD.
  C. All VM read operations are coming from HDD.
  D. VMs are unable to perform write operations.
  C. All VM read operations are coming from HDD.

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  Explanation/Reference:

  https://next.nutanix.com/prism-infrastructure-management-26/disk-space-usage-high-alert-in-prism-38199