ANS-C01 Network Management and Operations Practice Question
A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks. They want to limit traffic between specific VPCs for security purposes. Which feature should they use?
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
✓
Transit Gateway route tables.
Transit Gateway route tables control traffic between attachments by creating separate route tables and associating attachments accordingly, enabling isolation between specific VPCs. Option A is wrong because security groups are not supported on Transit Gateway attachments; they are instance-level. Option C is wrong because VPC Flow Logs are for monitoring traffic, not controlling it. Option D is wrong because Network ACLs are per-subnet and do not provide centralized control across attachments.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Security groups attached to the Transit Gateway.
Why it's wrong here
Security groups cannot be attached to Transit Gateway.
- ✓
Transit Gateway route tables.
Why this is correct
Route tables control which attachments can communicate.
- ✗
VPC Flow Logs.
Why it's wrong here
Flow Logs are for monitoring, not traffic control.
- ✗
Network ACLs in each VPC.
Why it's wrong here
NACLs are stateless and not designed for inter-VPC traffic control via Transit Gateway.
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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.