NCA-6.10 Practice Test

Explanation
Fordark site clusters, theNutanix Compatibility Bundlemust be downloaded prior to running LCM Inventory or updates. This bundle contains the necessary metadata and software binaries to perform inventory collection and upgrades in environments without internet connectivity.
A. Nutanix Foundation:Incorrect, as Foundation is used for initial deployments, not for LCM updates.
B. Nutanix Compatibility Bundle:Correct, as it contains the necessary files for offline LCM operations.
C. Nutanix Prism Central:Incorrect, as this does not pertain to offline updates. D. Nutanix Foundation Platform:Incorrect, as this is not required for LCM Inventory or updates. References:
Nutanix Life Cycle Manager Guide: Dark Site Configuration.
Nutanix Support Knowledge Base Article on Compatibility Bundles.

Explanation
TheNutanix Moveutility is specifically designed for migrating VMs between hypervisors, including from ESXi to AHV. It automates the migration process while ensuring minimal downtime. Nutanix Move supports pre-migration assessments and automates data transfer and VM configuration for AHV.
A. Move:Correct, as it is the Nutanix tool for hypervisor migrations.
B. acli:Incorrect, as acli is used for command-line configuration and management within AHV, not migration.
C. Flow:Incorrect, as Nutanix Flow focuses on network security and micro-segmentation.
D. Ncli:Incorrect, as Ncli is a command-line utility for cluster management, not migration.
References:
Nutanix Move Documentation: Supported Workflows.
Nutanix University Training on VM Migration.

Explanation
Non-migratable VMs in a Nutanix cluster typically include those with attached Volume Groups. This is because such VMs leverage direct-attached storage via iSCSI, which ties them to a specific host, preventing live migration to another host. Volume Groups provide block storage to applications, and the iSCSI protocol does not support live migration of such connections.
Here's a breakdown of the options:
A. VMs without NGT:Nutanix Guest Tools (NGT) are used for guest-level integration but do not affect VM migratability.
B. VMs marked as an Agent:This setting does not inherently make VMs non-migratable. It primarily
affects roles and tasks within certain configurations.
C. Memory Overcommitted:While memory overcommitment can affect performance, it does not make VMs non-migratable. Nutanix AHV handles memory allocation dynamically.
D. VMs with attached Volume Groups:Correct answer, as the iSCSI connections used by Volume Groups are host-specific and cannot migrate seamlessly.
References:
Nutanix AHV Administration Guide: Nutanix Documentation
Nutanix Support KB Article on Volume Groups and VM Migration Limitations.
Nutanix University Certification Materials, NCP and NCM course modules.

Explanation
The Controller VM (CVM) uses thevs0bridge by default to communicate with the AHV host it runs on. The vs0bridge is a virtual switch configured on the AHV host, providing connectivity between the CVM, virtual machines, and external networks. This setup ensures efficient network communication within the Nutanix cluster.
Other options:
virbro: Typically used in standalone KVM configurations, not in Nutanix AHV.
broandbridge0: Incorrect references to Nutanix networking structures.
References:
Nutanix AHV Networking Guide - Bridge Configuration.
Nutanix Prism Networking UI Documentation.

Explanation
The OpLog (Operational Log) in Nutanix serves as apersistent write bufferfor incoming I/O operations. It temporarily stores write requests to ensure fast acknowledgment to clients and better performance. The data is later coalesced and written to the Extent Store for long-term storage.
A. Persistent write buffer:Correct, as the OpLog optimizes write performance by buffering writes temporarily.
B. Persistent data storage:Incorrect, as this describes the Extent Store, not the OpLog.
C. Global metadata:Incorrect, as metadata operations are handled by the Metadata Store.
D. Dynamic read cache:Incorrect, as read caching is managed separately, often involving SSD-based caches.
References:
Nutanix Bible: Explanation of OpLog and Extent Store.
Nutanix University: NCP Certification Study Materials.