ANS-C01 Network Management and Operations Practice Question
A company has a VPC with both IPv4 and IPv6 CIDR blocks. The network engineer needs to capture all traffic between the VPC and the internet. Which THREE resources must have VPC Flow Logs enabled?
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
✓
Internet gateway
Options A (Internet gateway), B (NAT gateway), and E (Egress-only internet gateway) are correct because each of these resources has an attached network interface that can have VPC Flow Logs enabled to capture all traffic to and from the internet. Specifically, the internet gateway handles IPv4 and IPv6 traffic, the NAT gateway handles IPv4 traffic from private subnets, and the egress-only internet gateway handles IPv6 traffic from private subnets. Option C (Subnet) is incorrect because flow logs are configured on network interfaces, not on subnets directly. Option D (VPC) is incorrect because flow logs are not attached to the VPC itself; they are attached to individual network interfaces.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Internet gateway
Why this is correct
The internet gateway's ENI captures traffic to/from the internet.
- ✓
NAT gateway
Why this is correct
NAT gateway's ENI captures IPv4 traffic from private subnets.
- ✗
Subnet
Why it's wrong here
Subnets do not have network interfaces for flow logs.
- ✗
VPC
Why it's wrong here
Flow logs are enabled on network interfaces, not the VPC directly.
- ✓
Egress-only internet gateway
Why this is correct
Egress-only internet gateway handles IPv6 traffic to the internet.
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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.