CV0-004 Troubleshooting Practice Question
A company uses a hybrid cloud model with an AWS Direct Connect connection to its on-premises network. Users report intermittent connectivity to cloud resources. A network engineer finds packet loss on the Direct Connect virtual interface. Which of the following should be checked FIRST to resolve the issue?
⚠ Common exam trap
Watch out — candidates often confuse Direct Connect with VPN-based connections and assume a VPN tunnel is involved, leading them to check VPN status (Option D) instead of the BGP session that actually governs the virtual interface routing.
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
✓
The BGP session status between the on-premises router and the AWS Direct Connect endpoint
Intermittent packet loss on a Direct Connect virtual interface is most commonly caused by BGP session flapping or misconfiguration, as BGP is the routing protocol that establishes and maintains connectivity between the on-premises router and the AWS Direct Connect endpoint. Checking the BGP session status first allows the engineer to quickly identify if the issue is due to route advertisement problems, hold timer mismatches, or session resets, which are frequent root causes of intermittent packet loss.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The physical port status of the Direct Connect router
Why it's wrong here
Physical port issues would cause complete failure, not intermittent loss.
- ✗
The MTU setting on the on-premises firewall
Why it's wrong here
MTU issues typically cause dropped packets for large frames, not general intermittent loss.
- ✓
The BGP session status between the on-premises router and the AWS Direct Connect endpoint
Why this is correct
BGP flapping can cause intermittent packet loss and connectivity issues.
- ✗
The VPN tunnel status for the Direct Connect link
Why it's wrong here
Direct Connect does not use a VPN tunnel; it's a dedicated connection.
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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.