ANS-C01 Network Management and Operations Practice Question
A company is using AWS Transit Gateway to connect multiple VPCs and an on-premises network via Direct Connect. They notice that traffic between VPCs is being dropped intermittently. Which TWO actions should the engineer take to diagnose the issue? (Choose two.)
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
✓
Monitor the Transit Gateway's CloudWatch metrics for packets dropped due to route table limits
Monitoring Transit Gateway CloudWatch metrics for dropped packets can identify route table limits or throttling issues. Option C is correct because enabling VPC Flow Logs helps analyze traffic patterns and identify dropped packets. Option B is incorrect because security groups do not apply to Transit Gateway; they apply to ENIs. Option D is incorrect because overlapping VPC CIDRs can be handled with proper routing and do not cause intermittent drops by themselves. Option E is incorrect because creating a VPN connection is a solution, not a diagnostic step.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Monitor the Transit Gateway's CloudWatch metrics for packets dropped due to route table limits
Why this is correct
Correct. Monitoring Transit Gateway CloudWatch metrics can show packets dropped due to route table limits or throttling.
- ✗
Review the security group rules on the Transit Gateway
Why it's wrong here
Incorrect. Security groups are applied to VPC resources, not to Transit Gateway itself.
- ✓
Enable VPC Flow Logs on the VPCs
Why this is correct
Correct. VPC Flow Logs capture IP traffic and can help identify dropped packets between VPCs.
- ✗
Check if the VPC CIDRs are overlapping
Why it's wrong here
Incorrect. Overlapping VPC CIDRs can be handled with proper routing and does not cause intermittent drops by itself.
- ✗
Create a VPN connection for backup
Why it's wrong here
Incorrect. Creating a VPN connection is a solution, not a diagnostic step, and does not help identify the current issue.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.