ANS-C01 Network Management and Operations Practice Question
Which THREE are best practices for managing network security in a multi-VPC AWS environment using AWS Transit Gateway?
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
✓
Use separate Transit Gateway route tables for different environments (e.g., production, development).
Options A, B, and D are correct. Using separate Transit Gateway route tables for different environments (A) enforces isolation and least privilege. Centralizing egress through a shared VPC with a NAT gateway or proxy (B) provides a controlled exit point for internet-bound traffic. Enabling VPC Flow Logs on all VPCs and centralizing logs in a security account (D) enables monitoring and auditing of traffic patterns. Option C is incorrect because a single route table would allow all VPCs to communicate, violating environment isolation. Option E is incorrect because network ACLs are stateless and not designed for inter-VPC traffic filtering in a Transit Gateway architecture; security groups and route tables are more appropriate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use separate Transit Gateway route tables for different environments (e.g., production, development).
Why this is correct
Separate route tables enable network isolation.
- ✓
Centralize internet egress traffic through a shared VPC with a NAT gateway or proxy.
Why this is correct
Centralized egress simplifies security monitoring.
- ✗
Attach all VPCs to a single Transit Gateway route table for simplicity.
Why it's wrong here
This would allow full connectivity, violating least privilege.
- ✓
Enable VPC Flow Logs on all VPCs and centralize logs in a security account.
Why this is correct
Flow logs provide visibility for security analysis.
- ✗
Use network ACLs on every subnet to filter traffic between VPCs.
Why it's wrong here
Network ACLs are stateless and add complexity; security groups are sufficient.
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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.