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| Section | Objectives |
|---|---|
| Data Protection and Backup Integration | - Snapshot Management - Backup Solutions Integration |
| Disaster Recovery Fundamentals | - DR Concepts (RPO, RTO, SLAs) - Business Continuity Principles |
| Prism Central Management | - DR Monitoring and Operations - Cluster and Site Management |
| Nutanix Disaster Recovery Architecture | - Protection Domains - Replication Types (Sync/Async) - Nutanix Leap Overview |
| Recovery Operations | - Failover and Failback Procedures - Test Recovery Workflows - Recovery Plans and Orchestration |
>> NCP-BC-7.5 Prüfungsübungen <<
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25. Frage
Which port needs to be opened between two Prism Centrals to ensure a successful AZ pairing?
Antwort: A
Begründung:
Disaster recovery orchestration in the Nutanix environment often involves the pairing of two separate Availability Zones (AZs), each managed by its own Prism Central instance. For these two management planes to communicate, exchange metadata, and synchronize Protection Policies and Recovery Plans, specific firewall ports must be open between them.
Port 9440 is the standard port used for all Prism Central and Prism Element web interface and API traffic.
During the AZ pairing process, the primary Prism Central must reach the recovery Prism Central ' s API to establish the trust relationship and pair the sites. Other ports mentioned, such as 2009 (Option A) and 2020 (Option B), are used for data replication between Controller VMs (CVMs) but are not used for the initial management-plane pairing between Prism Central instances. Port 2074 (Option C) is typically used for Nutanix Guest Tools (NGT) communication with the cluster. Therefore, ensuring port 9440 is open between the two Prism Central instances is a mandatory prerequisite for successful disaster recovery site pairing.
26. Frage
An administrator at a retail company is preparing to apply a critical OS security patch to a production SQL Server VM. Before starting, the administrator ensures the VM is part of a Protection Domain and manually creates a local snapshot (Recovery Point). Ten minutes after the patch is applied, the SQL service fails to start, and the database logs indicate corruption in the system registry. The administrator needs to return the VM to its functional state from ten minutes ago as quickly as possible. The administrator decides to perform a Restore from the local snapshot. Under which condition would an In-place Restore (Revert) fail, forcing the administrator to use the Clone (Out-of-place) option instead?
Antwort: D
Begründung:
An In-place Restore (Revert) is the fastest way to roll back a VM because it overwrites the current vDisks with the data from the snapshot. However, this operation has strict requirements regarding the consistency of the VM ' s hardware configuration. The most common technical blocker for an in-place revert is a change in the disk topology between the time the snapshot was taken and the time of the restore.
If the administrator added a new 50GB data disk (Option D) after taking the snapshot, the VM ' s current configuration now includes a vDisk that does not exist in the snapshot ' s metadata. Nutanix AOS cannot " revert " a disk that has no point-in-time reference in the recovery point. In this situation, the " In-place Restore
" button is typically disabled or will throw an error, forcing the administrator to use the " Clone " (Out-of- place) option. Cloning creates a new VM based exactly on the snapshot ' s metadata, effectively ignoring the newly added disk. While changing memory (Option B) or NGT versions (Option A) might affect performance or guest features, they do not usually prevent the storage-level revert operation. Being forced into a " Clone " restore increases the RTO slightly, as the administrator must then delete the corrupted VM and ensure the new clone has the correct network settings.
27. Frage
What is the bandwidth limit of a single Nutanix Cloud Gateway for IPSec traffic?
Antwort: A
Begründung:
The Nutanix Cloud Gateway serves as a critical bridge between on-premises Nutanix clusters and the Nutanix Cloud Availability Zone (AZ). Its primary role is to provide a secure, encrypted tunnel for replicating recovery points and managing disaster recovery orchestration metadata. When utilizing standard IPSec for this traffic, the system architecture imposes certain throughput limitations based on the processing capabilities of the gateway instance. For a single Nutanix Cloud Gateway, the maximum supported bandwidth for IPSec- encrypted traffic is 1 Gbps.
This 1 Gbps limit is an important consideration for BCDR planning, as it defines the maximum " Snapshot-on- wire " throughput available for a given protection policy. If an organization has a high data change rate (churn) that exceeds 1 Gbps of sustained replication traffic, the Recovery Point Objective (RPO) may be at risk of lag. While the physical network link might be 10 Gbps or higher, the encryption overhead of the IPSec protocol within the gateway VM is the limiting factor. To achieve higher aggregate throughput, administrators would need to deploy multiple gateways or consider high-performance direct connectivity options if available.
Understanding this 1 Gbps threshold ensures that administrators can accurately size their replication windows and manage expectations for initial seed transfers and ongoing delta synchronization to the cloud AZ.
28. Frage
What must an administrator verify before starting a migration of entities from a protection domain to a protection policy?
Antwort: A
Begründung:
Migrating from legacy Protection Domain (PD) based management to the modern Prism Central (PC) based Protection Policies is a recommended best practice for scaling Nutanix Disaster Recovery. This migration involves moving VMs from a " Prism Element " centric management model to a centralized, category-based model in Prism Central.
To ensure that no data is lost during this transition, the most critical prerequisite is to verify that a successful, full replication (backup) of the Protection Domain has recently completed. This ensures that the recovery site already possesses a complete and consistent set of data for the VMs before they are unlinked from the old policy and attached to the new one. While adding VMs to a category (Option A) is a step in the process, it is not the first verification step required for data safety. If an administrator attempts to migrate while a replication is incomplete or failing, the transition to the new policy might leave the VMs unprotected for an extended period, or recovery points might be missing if a disaster occurs mid-migration. By completing a full backup of the PD first, the administrator creates a " safety net " of recovery points that can be used if the migration itself encounters issues. This ensures that the transition to modern DR is performed with minimal risk to the business ' s data protection objectives.
29. Frage
Which file system is supported on Linux VMs for Self-Service Restore?
Antwort: A
Begründung:
Nutanix Self-Service Restore (SSR) allows end-users to recover files from snapshots without needing assistance from a cluster administrator. This functionality is enabled by Nutanix Guest Tools (NGT), which mounts a snapshot disk to the guest VM. For SSR to function, the Nutanix Guest Agent (NGA) must be able to recognize and mount the file systems present on the snapshots.
For Linux-based virtual machines, Nutanix SSR supports standard, modern journaling file systems. EXT4 is the most widely supported and common file system used across modern Linux distributions like RHEL, CentOS, and Ubuntu, and it is natively supported by the Nutanix SSR agent. While other file systems like XFS or older EXT versions might be supported by the OS itself, EXT4 is the primary validated target for SSR operations. NTFS (Option B) is primarily a Windows file system, though it can be mounted on Linux, it is not the native standard for Linux SSR. Supporting the native file system of the guest OS is critical because it ensures that file permissions and ownership (UID/GID) are preserved during the recovery process. This compatibility allows users to seamlessly mount the snapshot, navigate to the required directory, and restore deleted or corrupted files directly to their production environment.
30. Frage
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