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Difficulty: MediumAWS Network Services

An enterprise has deployed 5050 Virtual Private Clouds (VPCs) across multiple AWS accounts to segment different business units. The network administration team wants to interconnect all of these VPCs to allow full communication between them. They need a solution that acts as a centralized cloud router to simplify the routing configuration and avoid managing a complex web of individual point-to-point connections.

Which AWS service or feature should the enterprise use to meet these requirements?

  1. Transit GatewayAnswer
  2. B
    VPC Peer Connections
  3. C
    Security Group rules
  4. D
    Network Access Control Lists

Answer

Transit Gateway
Transit Gateway is the correct choice because it acts as a centralized cloud router. It allows organizations to connect multiple VPCs and on-premises networks to a single hub, greatly simplifying network architecture and routing management as the number of VPCs grows.

Step-by-Step Solution

1
Analyze the business and technical requirements.
The requirement is to interconnect 5050 VPCs across multiple accounts using a centralized cloud router to avoid point-to-point mesh complexity.
This establishes that we need a hub-and-spoke networking model rather than peer-to-peer connection models.
2
Evaluate the available AWS networking options against the centralized hub requirement.
Transit Gateway acts as a central regional router to simplify multi-VPC connectivity, whereas VPC Peer Connections require complex mesh management for large numbers of VPCs.
This identifies the service designed specifically to solve the scalability issues of point-to-point routing.

Key Concept

Transit Gateway simplifies network topology by acting as a centralized hub that routes traffic between multiple Virtual Private Clouds (VPCs) and on-premises networks.
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Topics

AWS Network Services

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