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3V0-25.25 VMware Cloud Foundation 9.0 Networking

  • VMware
  • 5 free sample questions

About this exam

3V0-25.25 is the VMware exam VMware Cloud Foundation 9.0 Networking. Paid practice material for this exam is not available yet, but you can try its free sample questions.

Exam code
3V0-25.25
Vendor
VMware
Practice questions
Not available yet
Free sample questions
5
Question bank last updated
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Try 2 sample questions

Taken from the free sample set for 3V0-25.25.

Question 1

An administrator has deployed a new VMware Cloud Foundation (VCF) management domain.

To be compliant with company policy, backups must be configured to occur anytime a change is made to the NSX configuration.

How can the administrator ensure that complete configuration backups are captured every time a change occurs?

  1. Option A:

    Configure an alarm to detect configuration changes and automatically trigger a complete configuration backup.

  2. Option B:

    No action is required as by default NSX will automatically perform a complete backup every time a change is

    made to the configuration.

  3. Option C:

    Configure a cron job on the NSX Manager to automatically perform an incremental backup of the NSX

    configuration every hour.

  4. Option D:

    Create a recurring backup schedule and explicitly indicate that backups should be captured anytime the

    configuration changes.

Show answer and explanation

Correct answer: D

Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:

In VMware Cloud Foundation (VCF) , the protection of the NSX Manager configuration is paramount, as it contains the state of the entire software-defined network,

including firewall rules, logical switches, and routing topologies. To meet strict compliance requirements for real-time or change-based protection,

NSX offers specific automated backup triggers.

Within the NSX Manager UI (under System > Lifecycle > Backup & Restore), an administrator can configure the backup behavior.

While a time-based schedule (e.g., daily at 2:00 AM) is common, it does not satisfy the requirement for backups "anytime a change is made." To accomplish this,

the administrator must enable the "Backup on Configuration Change" toggle within the backup scheduling configuration.

When this feature is enabled, the NSX Manager monitors its own management database (DS) for write operations.

Once a configuration change is detected (such as adding a segment or modifying a DFW rule), the system initiates an automated backup process.

This ensures that the backup repository always contains a near-instantaneous reflection of the current network state, minimizing data loss in the event of a cluster failure.

Option B is incorrect because this feature is not enabled by default; it requires an external SFTP/FTP server to be configured first. Option C

(Cron jobs) is an unsupported manual workaround that bypasses the SDDC-native management tools. Option A is redundant as the

functionality is built directly into the NSX backup engine. Consequently, the verified method for compliance is to use the native recurring backup schedule with the

"Detect Configuration Change" option enabled .

Question 2 (choose 2)

An administrator is enabling IPv6-to-IPv4 communication for workloads hosted in an NSX environment. The workloads use IPv6-only addressing, but the external

systems they must reach are IPv4-only. To provide this translation service, the administrator decides to configure NAT64. Which two following

characteristics about NAT64 are true? (Choose two.)

  1. Option A:

    NAT64 is stateless and requires gateways to be deployed in active-standby mode.

  2. Option B:

    NAT64 requires the Tier-1 gateway to be configured in active-standby mode

  3. Option C:

    NAT64 is supported on Tier-1 gateways only.

  4. Option D:

    NAT64 is supported on Tier-0 and Tier-1 gateways.

  5. Option E:

    NAT64 requires the Tier-1 gateway to be configured in active-active mode.

Show answer and explanation

Correct answer: B, D

As organizations modernize their infrastructure with VCF 5.x and 9.0 , IPv6 adoption becomes more prevalent.

NAT64 is a critical transition technology that allows IPv6-only hosts to communicate with IPv4-only resources by translating the packet headers.

In NSX, NAT64 is a stateful service . Stateful services in the NSX architecture require a centralized point of processing to maintain the session state table. Because

of this requirement, any gateway (Tier-0 or Tier-1) providing NAT64 services must be configured in Active-Standby high availability mode . In Active-Active mode,

asymmetric return traffic could hit a different Edge node that does not have the session information, causing the translation to fail. This is a fundamental design

constraint for stateful NAT in NSX.

Furthermore, VMware NSX documentation specifies that NAT64 is a flexible service that can be implemented at multiple tiers of the logical routing hierarchy.

It is supported on both Tier-0 and Tier-1 gateways . The choice of where to place the NAT64 service depends on the design requirements: placing it on the

Tier-1 gateway allows for tenant-specific translation and offloads the Tier-0, while placing it on the Tier-0 provides a centralized translation point for all connected segments.

Option A is incorrect because NAT64 in NSX is stateful, not stateless. Option C is incorrect because it is not limited to Tier-1

. Option E is incorrect because Active-Active mode does not support the stateful nature of the NAT64 engine. Consequently,

the correct architecture requires an Active-Standby configuration on either a Tier-0 or Tier-1 gateway to properly facilitate the translation

between the IPv6 workloads and the IPv4 external world.

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