CompTIA
CV0-003 · Question #268
CV0-003 Question #268: Real Exam Question with Answer & Explanation
The correct answer is C: Run a script to remove stale DNS entries.. This question covers cloud DNS hygiene - specifically, stale DNS records that persist after a server is deprovisioned cause IP-to-hostname mismatches when that IP is reassigned.
Troubleshooting
Question
A customer recently provisioned a new server on the IaaS. The IP address assigned from the pool resolves to another hostname. Some user traffic is being dumped or is causing slowness because of this issue. Which of the following maintenance activities does the provider need to perform to prevent this issue?
Options
- AUse cloud provider tools to remove orphaned resources.
- BInitiate resource reclamation.
- CRun a script to remove stale DNS entries.
- DUpdate outdated security firewall configurations.
Explanation
This question covers cloud DNS hygiene - specifically, stale DNS records that persist after a server is deprovisioned cause IP-to-hostname mismatches when that IP is reassigned.
Common mistakes.
- A. Orphaned resource removal addresses unused cloud objects such as unattached disks or idle instances, not DNS resolution mismatches.
- B. Resource reclamation reclaims compute or storage capacity from idle or terminated resources and does not correct DNS records.
- D. Firewall configuration updates control traffic filtering and access rules and have no effect on how DNS resolves an IP address to a hostname.
Concept tested. Stale DNS entry cleanup after IP pool reclamation
Reference. https://learn.microsoft.com/en-us/azure/dns/dns-overview
Topics
#stale DNS entries#IP address management#IaaS maintenance#orphaned resources
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