A company is planning its cloud architecture and wants to use a VPC for each of its three products per environment in two regions, totaling 18 VPCs. The products have interdependencies, consuming services between VPCs. Which of the following should the cloud architect use to connect all the VPCs?
In a scenario where a company has multiple VPCs with interdependencies and needs to connect them efficiently, a hub-and-spoke architecture is the ideal choice. This model involves a central hub VPC to which all other VPCs (spokes) are connected. It provides centralized control over network traffic, simplifies management and reduces the complexity of having multiple direct connections between VPCs. Furthermore, it enhances scalability and security by centralizing routing and security policies at the hub, making it well-suited for environments with multiple interconnected VPCs.
C. **Hub and spoke** A hub-and-spoke network architecture is well-suited for connecting multiple VPCs (Virtual Private Clouds) with interdependencies. In this architecture, you have a central hub VPC that serves as a centralized point for connecting to other VPCs (the spokes). Each product's VPC can be a spoke connected to the central hub VPC. This approach offers several advantages: 1. **Centralized Control**: The hub VPC can provide centralized control over network traffic, security policies, and routing. 2. **Reduced Complexity**: It simplifies network management by avoiding direct connections between every pair of VPCs, which can become complex as the number of VPCs grows. 3. **Security**: You can implement security measures, such as Network Address Translation (NAT) gateways and firewall rules, at the hub to control traffic between VPCs.
4. **Interconnectivity**: The hub VPC can act as a transit point for inter-VPC communication, allowing for communication between products while maintaining network isolation. 5. **Scalability**: As your organization expands and adds more VPCs, you can easily connect them to the existing hub. While VPN connections and VPC peering are useful for specific scenarios, a hub-and-spoke architecture is better suited when you need to connect multiple VPCs with complex interdependencies and maintain centralized control and security.
Ok changing to Hub and Spoke since the scenario includes a more complex environment. From AWS: "If more than two network address spaces (VPCs, on-premises networks) are connected via VPC peering, AWS Direct Connect, or VPN, then use a hub-and-spoke model like that provided by AWS Transit Gateway. For only two such networks, you can simply connect them to each other, but as the number of networks grows, the complexity of such meshed connections becomes untenable. AWS Transit Gateway provides an easy to maintain hub-and-spoke model, allowing routing of traffic across your multiple networks."
C. Hub and spoke: This architecture involves a central hub VPC that connects to all other VPCs (spokes). It scales well and simplifies management by reducing the number of direct connections required between VPCs. All traffic between spoke VPCs goes through the hub, facilitating easier routing and security management.
My understanding of hub and spoke as it pertains to cloud computing is incomplete but I'm sticking with VPC Peering.
I often agree with Pongsathorn but I'm going with VPC peering. Hub and spoke seems more appropriate for a physical network. From AWS: https://docs.aws.amazon.com/vpc/latest/peering/what-is-vpc-peering.html