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CV0-002 · Question #476

An administrator is using a script to create ten new VMs in a public cloud. The script runs and returns no errors. The administrator confirms that all ten VMs show up in the dashboard, but only the fi

The correct answer is C. IP address depletion. If VMs are created and visible but some do not respond to pings, the most likely cause is the depletion of available IP addresses preventing full network initialization.

Troubleshooting

Question

An administrator is using a script to create ten new VMs in a public cloud. The script runs and returns no errors. The administrator confirms that all ten VMs show up in the dashboard, but only the first eight reply to pings. Which of the following is the MOST likely cause of the issue?

Options

  • AWorkflow credential errors
  • BAPI request limitations
  • CIP address depletion
  • DBatch job scheduling issue

How the community answered

(33 responses)
  • A
    6% (2)
  • B
    15% (5)
  • C
    76% (25)
  • D
    3% (1)

Why each option

If VMs are created and visible but some do not respond to pings, the most likely cause is the depletion of available IP addresses preventing full network initialization.

AWorkflow credential errors

Workflow credential errors would likely cause the script to fail outright or prevent any VMs from being created, not just some of them from responding to pings.

BAPI request limitations

API request limitations would typically result in explicit API errors or failures to create the VMs beyond a certain number, not partial functionality where VMs are created but don't respond to pings.

CIP address depletionCorrect

IP address depletion means that while the VMs might be provisioned and visible in the dashboard, they cannot fully initialize or communicate on the network because there are no available IP addresses in the subnet to assign to their network interfaces. This would prevent them from responding to pings, even if their virtual hardware is configured.

DBatch job scheduling issue

Batch job scheduling issues might delay the creation or startup of VMs, but once created and visible, it wouldn't selectively prevent only some from responding to pings due to a scheduling problem.

Concept tested: Cloud networking - IP address allocation

Source: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq#how-do-i-assign-private-ip-addresses-to-vms-and-cloud-services

Topics

#IP address management#Network connectivity#VM deployment#Public cloud networking

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