Nutanix NCP-BC-7.5認證資料 - NCP-BC-7.5考試內容

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NCP-BC-7.5考試內容 - NCP-BC-7.5題庫更新

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最新的 Nutanix NCP-BC NCP-BC-7.5 免費考試真題 (Q110-Q115):

問題 #110
Which log file should an administrator review to ensure consistent connectivity stability between primary and remote disaster recovery sites?

答案：B

解題說明：
The Nutanix architecture relies on specialized services running on each Controller VM (CVM) to handle specific cluster operations. The " Cerebro " service is the primary engine responsible for data protection and replication tasks across the Nutanix cluster. It manages recovery points, snapshot schedules, and the actual transfer of data between the local cluster and remote sites. Consequently, the cerebro.INFO log file is the most vital resource for an administrator troubleshooting replication health or site-to-site connectivity. This log records critical events such as the start and completion of replication jobs, handshake failures between clusters, and timeout errors during snapshot transfers. If an administrator notices that replication is " hung " or failing consistently, cerebro.INFO provides the granular detail needed to see if the issue is a network timeout, a remote service unavailability, or a metadata synchronization error. Reviewing this log helps ensure that the connection stability is maintained and that any deviations in replication performance are identified before they impact the Recovery Point Objective (RPO). Other logs like genesis.out (Option B) are more focused on service startup and configuration rather than the ongoing health of the BCDR replication stream.


問題 #111
An administrator is validating a newly created Recovery Plan and receives the following warning:
IP addresses xxx.xxx.xxx.xxx cannot be preserved/mapped for VM REPORTVM01.
IP addresses cannot be preserved/mapped for entities
IP might be already in use or will be used by some other VM for recovery. IP cannot be mapped.
Only one IP address can be preserved for a vNIC in an IP address management enabled network.
What can the administrator do to resolve this warning without changing the existing IP address assigned to the VM?

答案：C

解題說明：
IP address management (IPAM) in Nutanix networks ensures that IP assignments are tracked to prevent conflicts. When a Recovery Plan is validated, the orchestrator checks if it can successfully assign the required IPs at the recovery site. The warning occurs when the system detects a potential conflict or cannot automatically " guarantee " the preservation of a static IP, often due to overlapping pools or the way IPAM is configured on the destination subnet.
To resolve this without changing the VM ' s assigned IP, the administrator should use " Custom VM IP Mapping " . This feature allows the administrator to override the default automatic assignment and explicitly state which IP the VM must receive at the recovery site. By manually defining this mapping, the administrator
" claims " the IP within the Recovery Plan ' s logic, satisfying the validation check and ensuring that the VM boots with its correct identity during a failover. Disabling IPAM (Option A) is often not feasible in production environments, and adding a vNIC (Option B) complicates the VM ' s OS configuration. Custom IP mapping is the purpose-built administrative tool for resolving IP assignment ambiguity and ensuring predictable recovery in complex, IPAM-enabled networking environments.


問題 #112
A company is recovering a 3-tier application (Database, Middleware, Web). The administrator executes the Recovery Plan. The Web tier VMs start up but applications immediately crash because they cannot connect to the Database tier. Which setting in the Recovery Plan should the administrator have configured to prevent this execution failure?

答案：A

解題說明：
Orchestrating the recovery of multi-tier applications requires more than just powering on virtual machines; it requires managing the dependencies between application layers. In a standard 3-tier architecture, the Middleware and Web tiers typically depend on the Database being fully operational and ready to accept connections before they can successfully initialize. If a Recovery Plan powers on all tiers too quickly or simultaneously, the " upstream " services will fail to find their database backend, leading to the application crashes described in the scenario.
The Nutanix Recovery Plan provides " execution stages " to handle this boot ordering. However, even if tiers are in separate stages, a VM reaching a " Power On " state in the hypervisor does not mean the application services (like SQL or Oracle) are fully booted and ready for traffic. To address this, the administrator should configure " optional inter-stage delays " . This setting allows the administrator to define a specific wait time (in seconds) between the completion of one stage (e.g., Database power-on) and the start of the next (e.g., Middleware power-on). This delay gives the database engine enough time to finish its internal checks, mount its databases, and open its network ports. By incorporating these surgical delays, the administrator ensures a reliable, automated recovery where each tier only attempts to start once its required dependencies are fully operational at the destination site.


問題 #113
A financial institution is designing a disaster recovery solution for a business-critical application that requires a zero recovery point objective (RPO). The infrastructure team decides to implement Nutanix Metro Availability between two physical data centers (DC-Alpha and DC-Beta) interconnected by a dedicated dark fiber. What is the maximum possible network latency on this link for this configuration to function correctly?

答案：D

解題說明：
Nutanix Metro Availability is a continuous availability solution designed to survive a site failure with zero data loss (Zero RPO). Because it operates on a synchronous replication model, every write performed by a virtual machine must be acknowledged by both the local and the remote clusters before the write is confirmed to the application. This process introduces a " latency penalty " equal to the network Round Trip Time (RTT) between the sites.
To maintain acceptable application performance and ensure cluster stability, Nutanix enforces a strict latency limit of 5 ms RTT between the primary and secondary clusters. If the latency exceeds this 5 ms threshold, the time spent waiting for remote acknowledgments would cause severe performance degradation for high-I/O workloads, such as the SQL or Oracle databases common in financial institutions. Furthermore, high latency increases the risk of the synchronous link being " broken " during periods of high data churn. While the Witness VM (used for tie-breaking) can tolerate much higher latency (up to 200 ms), the data-path link must remain under 5 ms to satisfy the technical requirements of the Metro Availability feature and the performance expectations of Tier-1 business-critical applications.


問題 #114
What snapshot recovery point interval does Self-Service Restore support in a Nearsync setup?

答案：C

解題說明：
Self-Service Restore (SSR) is a Nutanix feature that allows end-users to recover individual files by mounting a recovery point as a local drive within the guest VM. NearSync replication provides high-frequency protection with Recovery Point Objectives (RPOs) as low as 1 minute using Lightweight Snapshots (LWS).
However, there is a technical distinction in how these high-frequency points are handled for end-user recovery.
In a NearSync configuration, the system generates dozens of LWS throughout an hour. While these are available for full VM disaster recovery, Nutanix limits the " granularity " available for Self-Service Restore to manage metadata overhead and guest agent performance. By default, SSR in a NearSync environment typically supports recovery point intervals of 1 hour. This means that while an administrator can restore the entire VM to a state from 5 minutes ago, an end-user using the SSR browser inside the VM will see recovery points at 1-hour increments (the " consolidated " points). This design balances the need for high-frequency disaster protection with the operational efficiency of file-level recovery. If a user needs a file from a point between the hourly intervals, an administrator may need to perform a full VM clone or an " Out-of-place " restore to provide access to those more granular lightweight recovery points.


問題 #115
......

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