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CV0-004 Practice Question: Migrating its on-premises workloads to a public…
A company is migrating its on-premises workloads to a public cloud. The security team requires that all data in transit between the cloud resources and on-premises be encrypted. Which solution should the cloud architect recommend?
⚠ Common exam trap
Candidates often mistake TLS as sufficient for all data in transit, but TLS only encrypts application-level communications. A VPN encrypts the entire IP packet, ensuring all traffic between the cloud VPC and on-premises network is protected, regardless of the application.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement a VPN tunnel between the cloud VPC and the on-premises network.
A VPN tunnel encrypts all IP traffic between the cloud VPC and the on-premises network, ensuring data in transit is protected regardless of the application protocol. This satisfies the security requirement for encrypting all data in transit between the two environments, as VPNs typically use IPsec (RFC 4301) to provide confidentiality and integrity at the network layer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deploy a hardware security module (HSM) for key management.
Why it's wrong here
HSM manages encryption keys but does not encrypt data in transit.
- ✗
Enable encryption on the cloud storage buckets.
Why it's wrong here
Storage encryption protects data at rest, not in transit.
- ✗
Use TLS for all application traffic.
Why it's wrong here
TLS only encrypts application-layer traffic; other protocols may be unencrypted.
- ✓
Implement a VPN tunnel between the cloud VPC and the on-premises network.
Why this is correct
Correct. A VPN encrypts all network traffic between sites, ensuring all data in transit is encrypted.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.