CV0-004 Troubleshooting Practice Question
A cloud administrator is troubleshooting connectivity issues between two virtual networks in different regions. The virtual networks are peered, but instances cannot communicate. The administrator verifies that the peering status is 'Connected' and route tables appear correct. Which of the following should be checked next?
⚠ Common exam trap
Test-takers frequently assume a 'Connected' peering status guarantees traffic flow, but they overlook that network security group rules can silently drop traffic even when peering and routing are correctly configured.
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
✓
Network security group rules on the instances and subnets [CORRECT]
Even when virtual network peering status shows 'Connected' and route tables are correct, network security group rules can still block traffic. Network security groups act as a stateful firewall at the subnet or network interface level, and typically they deny all inbound traffic unless explicitly allowed. Since the administrator has already verified routing, the next logical step is to check network security group rules for any implicit deny or missing allow rules that could be dropping the inter-region 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.
- ✓
Network security group rules on the instances and subnets [CORRECT]
Why this is correct
Correct; NSGs can block traffic even if VNet peering is established.
- ✗
DNS resolution settings
Why it's wrong here
Incorrect; DNS affects name resolution, not direct IP connectivity.
- ✗
Gateway subnet configuration
Why it's wrong here
Incorrect; gateways are not required for VNet peering.
- ✗
Service endpoint status
Why it's wrong here
Incorrect; service endpoints are for accessing Azure PaaS services.
Visual reference
Go deeper
Related to this question
About these practice questions
One of 977 original CV0-004 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.