hardMultiple SelectObjective-mapped
CV0-004 Practice Question: A company uses a hybrid cloud model with an…
A company uses a hybrid cloud model with an on-premises data center connected to a public cloud via a VPN. Users report intermittent connectivity issues to cloud applications. Which THREE components should the administrator check to isolate the problem? (Choose three.)
⚠ Common exam trap
The trap here is that candidates often focus on application-level fixes (like rebooting instances) or DNS, when the real issue is a network-layer problem involving the VPN tunnel, routing, and security group rules that affect the path between on-premises and cloud resources.
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
✓
VPN tunnel status and configuration
The VPN tunnel is the direct connectivity link between the on-premises data center and the public cloud. Intermittent connectivity issues often stem from tunnel flapping, misconfigured IPsec parameters (such as mismatched pre-shared keys, IKE versions, or lifetime settings), or routing issues within the tunnel. Checking the VPN tunnel status and configuration helps identify whether the tunnel is up, stable, and correctly passing traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Rebooting the cloud instances
Why it's wrong here
Rebooting does not address the root cause of network connectivity issues.
- ✓
VPN tunnel status and configuration
Why this is correct
VPN tunnel issues are a common cause of connectivity problems.
- ✓
Security group rules in the cloud VPC
Why this is correct
Incorrect security group rules can block traffic.
- ✓
Route tables in the cloud VPC and on-premises
Why this is correct
Misconfigured route tables can cause traffic to be dropped or misrouted.
- ✗
DNS resolution configuration
Why it's wrong here
DNS issues would typically cause name resolution failures, not intermittent connectivity; it's less likely to be the primary cause.
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.