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NCP-BC-7.5試題 - NCP-BC-7.5測試

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最新的 Nutanix NCP-BC NCP-BC-7.5 免費考試真題 (Q67-Q72):

問題 #67
After a storage failover in a synchronous replication environment, users report higher I/O latency and degraded performance compared to pre-failover levels. Cluster health is normal, and replication is functioning correctly. Which post-failover cleanup action could the administrator perform to correct the performance issue?

答案:C

解題說明:
Synchronous replication environments (like Metro Availability) allow for zero-RPO failover, but the performance of the workload is highly dependent on " Data Locality " . Nutanix architecture is built on the principle that a VM ' s compute (vCPU/RAM) should ideally reside on the same host or cluster that serves its primary storage I/O.
During a storage failover, the " Active " container role may move to the recovery site, but the virtual machines might still be running on the primary site ' s compute nodes. This causes " Remote I/O, " where every read and write must traverse the network link to reach the active storage container at the other site, resulting in the reported higher latency and degraded performance. To resolve this, the administrator must " realign " the compute and storage by performing a vMotion (or live migration) of the VMs to the cluster that is now hosting the active storage role. While the Acropolis Dynamic Scheduler (ADS) (Option D) eventually attempts to rebalance, a manual realignment ensures that performance is restored immediately after the failover stabilization. Reconfiguring schedules (Option C) or retention (Option A) has no impact on real-time I
/O latency, highlighting the critical role of data locality in high-performance BCDR designs.


問題 #68
An administrator plans on performing a failover of a VM from a source cluster to a DR cluster. The administrator needs the VM ' s IP address preserved after failover. In what scenario is the VM ' s IP address preserved?

答案:A

解題說明:
Preserving IP addresses during a failover is a common requirement for applications with hardcoded IP references or complex inter-service dependencies. In a standard multi-site DR setup, the source and destination sites reside on different Layer 3 subnets, meaning a VM would naturally require a new IP address to be routable at the recovery site. To achieve " IP Preservation, " the underlying network infrastructure must support Layer 2 (L2) stretching.
L2 stretching (often implemented via VXLAN or specialized VPN tunnels like Nutanix Flow Virtual Networking) allows a single logical subnet to span multiple physical locations. When a VM fails over to a cluster on a stretched subnet, it effectively stays on the same network broadcast domain. As a result, its IP address, default gateway, and subnet mask remain valid and unchanged. If the subnets are not stretched, the administrator must rely on the Recovery Plan ' s " IP Mapping " feature to assign a new, valid IP at the destination-which does not " preserve " the original address. While preserving IPs simplifies application recovery, it requires more complex network engineering to ensure that traffic is correctly routed to the active site during a disaster, highlighting the trade-off between application simplicity and infrastructure complexity in BCDR design.


問題 #69
An administrator needs to perform a test failover on a Recovery Plan. What is the primary goal of this action?

答案:B

解題說明:
The " Test Failover " feature in Nutanix Disaster Recovery is a critical tool for ensuring that a BCDR plan is actually functional before a real disaster occurs. The primary goal of a test failover is to validate the entire recovery orchestration-including power-on sequences, script execution, and network mappings-in a completely non-disruptive manner.
During a test failover, the virtual machines are recovered at the destination site using the most recent snapshots, but they are typically connected to an " Isolated " or " Test " network. This allows the administrator to log into the recovered VMs and verify that the application starts correctly without causing any IP address conflicts or interference with the live production systems at the primary site. Unlike a " Planned Failover " or
" Unplanned Failover, " a test failover does not move the production workload (negating Option B) and does not stop ongoing replication (negating Option D). It is purely a validation task designed to identify gaps in the Recovery Plan, such as missing dependencies or incorrect network assignments, thereby providing confidence that the organization ' s RTO and RPO goals can be met during a real emergency.


問題 #70
A company ' s two clusters are part of the same availability zone. Prism Central, which holds the protection policy configuration and recovery plans, is located on Cluster A and protected by the Prism Central Backup and Restore mechanism. What is the first step to take to execute a disaster recovery plan on the datacenter hosting Cluster A?

答案:C

解題說明:
Prism Central (PC) acts as the centralized control plane for Nutanix Disaster Recovery, storing the critical metadata for Protection Policies and Recovery Plans. If the cluster hosting the Prism Central instance suffers a total failure, the " brain " of the DR orchestration is lost, and the administrator cannot trigger the Recovery Plans through the usual interface. To address this risk, Nutanix provides the " Prism Central Backup and Restore " feature, which replicates the PC metadata to a remote cluster managed by Prism Element (PE). In a disaster scenario affecting Cluster A, the first and most critical step is to recover the management plane. The administrator must log into Prism Element on the surviving cluster and use the native recovery workflow to restore the Prism Central instance from the most recent backup. Once the PC instance is restored and booted on the surviving cluster, it will once again have access to the Recovery Plans and Protection Policies. Only after the management plane is restored can the administrator then initiate the " Unplanned Failover " tasks to bring up the protected workloads. This process ensures that the RTO is kept low by restoring the automated orchestrator rather than manually re-creating policies and plans on a new instance (Option B).


問題 #71
What must be installed on a guest VM prior to enabling Self-Service Restore?

答案:A

解題說明:
Nutanix Guest Tools (NGT) is a software bundle that must be installed on the guest virtual machine (VM) to enable advanced management and data protection features within the Nutanix ecosystem. For the specific functionality of Self-Service Restore (SSR), NGT provides the necessary communication drivers and the Nutanix SSR agent. This agent allows end-users or administrators to mount recovery point snapshots as local drives directly within the guest operating system. Without NGT, the cluster lacks the specialized hooks into the guest OS required to perform granular file-level recovery without restoring the entire VM. Furthermore, NGT facilitates the creation of application-consistent snapshots by interacting with the Windows Volume Shadow Copy Service (VSS), which is often a prerequisite for high-integrity backups of Tier-1 applications like SQL Server or Exchange. By installing NGT, the VM is granted the intelligence to browse and attach historical vDisks, effectively enabling the SSR workflow and reducing the operational burden on the infrastructure team for simple file recovery requests.


問題 #72
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