Quick Answer
The answer is AWS Transit Gateway and Direct Connect Gateway. Transit Gateway acts as a central hub to interconnect multiple VPCs and on-premises networks, enabling transitive routing between all attached networks, which directly supports centralized traffic inspection by routing VPC-to-VPC traffic through a shared inspection VPC with a firewall appliance. The Direct Connect Gateway allows you to connect your on-premises network via AWS Direct Connect with BGP to multiple VPCs through a single Transit Gateway, simplifying the hybrid connectivity architecture. On the ANS-C01 exam, this pairing tests your understanding of how to decouple routing from individual VPCs and enforce security policies at a central point, a common scenario for large-scale multi-account designs. A frequent trap is choosing a single VPC peering or a VPN instead of Transit Gateway, which lacks the transitive routing and centralized inspection capabilities required. Memory tip: think of Transit Gateway as the “hub for inspection” and Direct Connect Gateway as the “on-ramp” that keeps BGP sessions clean and scalable.
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.
A company is designing a VPC with the following requirements: (1) Ability to connect to on-premises via AWS Direct Connect with BGP, (2) Ability to route traffic between multiple VPCs, (3) Centralized inspection of traffic between VPCs. Which AWS services should the company use? (Choose TWO.)
VPC peering connections
Why wrong: Does not support centralized inspection.
VPC endpoints
Why wrong: Not for inter-VPC connectivity.
AWS Transit Gateway
Central hub for inter-VPC routing and inspection.
Direct Connect Gateway
Connects Direct Connect to Transit Gateway for hybrid connectivity.
AWS Site-to-Site VPN
Why wrong: Does not provide inter-VPC routing.
Answer choices
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
AWS Transit Gateway (C) is correct because it acts as a central hub to interconnect multiple VPCs and on-premises networks, enabling transitive routing between all attached networks. It supports centralized traffic inspection by routing VPC-to-VPC traffic through a shared inspection VPC (e.g., with a firewall appliance) using route tables and attachments.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
VPC peering connections
Why it's wrong here
Does not support centralized inspection.
VPC endpoints
Why it's wrong here
Not for inter-VPC connectivity.
AWS Transit Gateway
Why this is correct
Central hub for inter-VPC routing and inspection.
Related concept
Read the scenario before looking for a memorised answer.
Direct Connect Gateway
Why this is correct
Connects Direct Connect to Transit Gateway for hybrid connectivity.
Related concept
Read the scenario before looking for a memorised answer.
AWS Site-to-Site VPN
Why it's wrong here
Does not provide inter-VPC routing.
Common exam traps
AWS often tests the misconception that VPC peering can be used for transitive routing or centralized inspection, but peering is non-transitive and requires full-mesh connectivity, making Transit Gateway the correct hub solution.
Detailed technical explanation
AWS Transit Gateway uses a BGP-based dynamic routing (via Direct Connect Gateway or VPN attachments) to exchange routes with on-premises networks, and it supports multicast and flow logs for traffic inspection. Direct Connect Gateway (D) is correct as it allows a single Direct Connect connection to be associated with multiple Transit Gateways or Virtual Private Gateways, enabling BGP peering from on-premises to the Transit Gateway for centralized routing. In practice, you attach the Direct Connect Gateway to the Transit Gateway, and then attach VPCs to the Transit Gateway, with a central inspection VPC (e.g., with a Palo Alto or AWS Network Firewall) to enforce security policies.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Transit Gateway — AWS Transit Gateway (C) is correct because it acts as a central hub to interconnect multiple VPCs and on-premises networks, enabling transitive routing between all attached networks. It supports centralized traffic inspection by routing VPC-to-VPC traffic through a shared inspection VPC (e.g., with a firewall appliance) using route tables and attachments.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO statements about AWS Transit Gateway are correct? (Choose two.)
mediumWhy B: Options B and C are correct. Transit Gateway supports transitive routing between attachments. It can be shared across accounts using AWS Resource Access Manager (RAM). Option A is wrong because it does not replace Direct Connect. Option D is wrong because it does not provide internet access. Option E is wrong because it supports both IPsec VPN and Direct Connect attachments.
Last reviewed: Jun 30, 2026
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.
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