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 has multiple VPCs that need to communicate with each other and with an on-premises network. They want to minimize operational overhead and avoid peering mesh complexity. Which AWS service should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
AWS Transit Gateway.
Transit Gateway provides a hub-and-spoke model, simplifying connectivity.
AWS PrivateLink.
Why wrong: PrivateLink is for exposing services, not general VPC connectivity.
AWS VPN CloudHub.
Why wrong: VPN CloudHub is for connecting remote offices, not VPCs.
VPC Peering.
Why wrong: VPC Peering requires many connections and doesn't scale well.
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 acts as a central hub to interconnect multiple VPCs and on-premises networks using a single gateway, eliminating the need for a full mesh of VPC peering connections. It simplifies network management by providing transitive routing between all attached networks, which directly addresses the requirement to minimize operational overhead and avoid peering mesh complexity.
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.
AWS Transit Gateway.
Why this is correct
Transit Gateway provides a hub-and-spoke model, simplifying connectivity.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
AWS PrivateLink.
Why it's wrong here
PrivateLink is for exposing services, not general VPC connectivity.
AWS VPN CloudHub.
Why it's wrong here
VPN CloudHub is for connecting remote offices, not VPCs.
VPC Peering.
Why it's wrong here
VPC Peering requires many connections and doesn't scale well.
Common exam traps
The trap here is that candidates often confuse AWS Transit Gateway with VPC Peering, mistakenly thinking that VPC Peering can scale to many VPCs without realizing it requires a full mesh of non-transitive connections, leading to exponential complexity.
Detailed technical explanation
AWS Transit Gateway uses a centralized routing table to manage traffic between all attached VPCs, VPN connections, and Direct Connect gateways, supporting up to 5,000 attachments per gateway. It leverages BGP for dynamic route exchange with on-premises networks and supports multicast, which is not available with VPC peering. In a real-world scenario, a company with dozens of VPCs across multiple accounts and regions can use Transit Gateway to simplify compliance and auditing by centralizing route policies and flow logs.
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 acts as a central hub to interconnect multiple VPCs and on-premises networks using a single gateway, eliminating the need for a full mesh of VPC peering connections. It simplifies network management by providing transitive routing between all attached networks, which directly addresses the requirement to minimize operational overhead and avoid peering mesh complexity.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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