The answer is network connectivity issues between the source and target hypervisors, incompatible CPU features, and insufficient storage capacity on the target host. These three factors directly disrupt the live migration process because VM migration relies on a stable, high-bandwidth network link to transfer memory and disk states, while CPU feature sets must match between hosts to prevent instruction-set mismatches that crash the guest OS, and the target must have enough free storage to accommodate the VM’s virtual disks. On the CompTIA Cloud+ CV0-004 exam, this question tests your understanding of common causes of VM migration failure in cloud environments, often appearing as a “choose three” item where stale DNS records or license checks are plausible distractors—DNS issues cause name resolution delays but not migration failure, and license checks are less common than resource constraints. A useful memory tip is to think of the three C’s: Connectivity, CPU, and Capacity.
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which THREE of the following are common causes of VM migration failures in a cloud environment? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Incompatible CPU instruction sets or features between source and target hosts
Options A, C, and D are correct. Incompatible CPU features (A) can cause migration failures, insufficient storage capacity (C) on target, and network connectivity issues (D) between hosts. Option B is wrong: stale DNS records may cause name resolution problems but not migration failure. Option E is wrong: license checks may block migration but are less common than resource issues.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Expired software licenses on the target host
Why it's wrong here
License checks are not typical causes; VMs carry their own licenses.
✓
Incompatible CPU instruction sets or features between source and target hosts
Why this is correct
Different CPU generations can prevent live migration.
Related concept
Static NAT maps one inside address to one outside address.
✗
Stale DNS records for the VM's hostname
Why it's wrong here
DNS is not critical for hypervisor-level migration.
Static NAT maps one inside address to one outside address.
✓
Network connectivity issues between the source and target hypervisors
Why this is correct
Migration traffic needs stable network.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CV0-004 NAT questions on configuration and troubleshooting.
Operations and Support — This question tests Operations and Support — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Incompatible CPU instruction sets or features between source and target hosts — Options A, C, and D are correct. Incompatible CPU features (A) can cause migration failures, insufficient storage capacity (C) on target, and network connectivity issues (D) between hosts. Option B is wrong: stale DNS records may cause name resolution problems but not migration failure. Option E is wrong: license checks may block migration but are less common than resource issues.
What should I do if I get this CV0-004 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CV0-004 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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