SAA-C03 Question 262

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• 3

  A. Create a peering connection between the VPCs. Add a route table entry for the peering connection in both VPCs. Configure an inbound rule for the ElastiCache cluster’s security group to allow inbound connection from the application’s security group. Creating a peering connection between the VPCs allows the application's EC2 instances to communicate with the ElastiCache cluster directly and efficiently. This is the most cost-effective solution as it does not involve creating additional resources such as a Transit VPC, and it does not incur additional costs for traffic passing through the Transit VPC. Additionally, it is also more secure as it allows you to configure a more restrictive security group rule to allow inbound connection from only the application's security group.

• Chose A2

  Create a peering connection between the VPCs. Add a route table entry for the peering connection in both VPCs. Configure an inbound rule for the ElastiCache cluster’s security group to allow inbound connection from the application’s security group.

• Chose A2

  Create a VPC peering connection between the Cache VPC and App VPC. This allows private IP connectivity between the VPCs. Add route table entries in each VPC to route traffic destined to the other VPC via the peering connection. This enables network routing. Configure security groups to allow inbound connections from the application instances to the ElastiCache cluster.