The answer is AWS Transit Gateway Network Manager because it is the only AWS service that natively supports centrally defining and enforcing tag-based routing policies across multiple VPCs attached to a Transit Gateway. This feature works by allowing you to create routing policies that automatically allow or deny traffic between VPCs based on their assigned tags, eliminating the need to manually manage individual route tables or propagate routes. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of centralized policy management versus manual route table manipulation; a common trap is to confuse Network Manager with Resource Access Manager or VPC Peering, which lack policy-based routing capabilities. Remember that Network Manager’s routing policies are evaluated before the route table lookup, giving you a powerful, tag-driven traffic filter. A useful memory tip is “Tags + Transit Gateway = Network Manager Policies,” linking the key components of the solution.
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization has multiple VPCs connected to a common Transit Gateway. The network team wants to centrally manage and enforce routing policies, such as allowing or denying traffic between specific VPCs based on tags. Which AWS feature should be used to implement this requirement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Transit Gateway Network Manager
AWS Transit Gateway Network Manager provides a central dashboard to manage and monitor transit gateways, on-premises networks, and attached VPCs. It supports defining and enforcing routing policies based on tags, enabling the network team to centrally allow or deny traffic between specific VPCs without manually managing individual route tables.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Transit Gateway Network Manager
Why this is correct
Correct; Network Manager provides centralized visibility and policy-based management for Transit Gateway.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Direct Connect Gateway
Why it's wrong here
Incorrect; Direct Connect Gateway is for connecting multiple VPCs to on-premises.
✗
Amazon Route 53 Resolver
Why it's wrong here
Incorrect; Route 53 Resolver handles DNS queries, not routing policies.
✗
VPC Peering with route tables
Why it's wrong here
Incorrect; VPC Peering does not support tag-based routing policies centrally.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Transit Gateway Network Manager with basic Transit Gateway route tables, assuming manual route table configuration is sufficient, but the question specifically requires centralized, tag-based policy enforcement which only Network Manager provides.
Detailed technical explanation
How to think about this question
Transit Gateway Network Manager leverages the Transit Gateway Route Table and integrates with AWS Resource Access Manager to share route tables across accounts. It uses tag-based policies to dynamically control route propagation and acceptance, which is implemented via the AWS Transit Gateway Connect feature and BGP over GRE for on-premises attachments, allowing granular traffic segmentation without static route entries.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Transit Gateway Network Manager — AWS Transit Gateway Network Manager provides a central dashboard to manage and monitor transit gateways, on-premises networks, and attached VPCs. It supports defining and enforcing routing policies based on tags, enabling the network team to centrally allow or deny traffic between specific VPCs without manually managing individual route tables.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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