Question 1,329 of 1,621
ANS-C01 Network Management and Operations Practice Question
A network engineer needs to capture and analyze traffic crossing a VPC peering connection for troubleshooting. Which AWS service should be used?
⚠ Common exam trap
A common mix-up: candidates confuse VPC Flow Logs (which log traffic metadata) with VPC Traffic Mirroring (which captures full packet payloads), but Traffic Mirroring cannot be applied to a peering connection itself, only to individual ENIs within a VPC.
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
✓
VPC Flow Logs for the peering connection.
VPC Flow Logs capture IP traffic information for network interfaces, including those attached to a VPC peering connection. They can be published to Amazon CloudWatch Logs or Amazon S3, and the logs contain fields such as source/destination IP, ports, protocol, and packet/byte counts, which are essential for troubleshooting traffic across the peering link. This is the correct service because it directly logs metadata about the traffic traversing the peering connection without requiring any changes to the network path.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS CloudTrail.
Why it's wrong here
CloudTrail captures API calls, not network traffic.
- ✗
VPC Traffic Mirroring.
Why it's wrong here
Traffic Mirroring copies traffic from ENIs, not directly for peering.
- ✗
AWS Transit Gateway Network Manager.
Why it's wrong here
Network Manager visualizes topology but does not capture traffic.
- ✓
VPC Flow Logs for the peering connection.
Why this is correct
Flow Logs capture IP traffic metadata.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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Last reviewed: Jun 24, 2026
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