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Answer: Establish a VPC peering connection and set up route tables and security group rules accordingly.
Option A is the most cost-effective solution. Creating a VPC peering connection between the VPCs requires setting up route tables and configuring security group rules to allow the necessary traffic. This approach avoids the additional complexity and costs associated with setting up and maintaining a Transit VPC, which involves more infrastructure and management overhead. Therefore, A is the correct answer.
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A solutions architect is tasked with enabling access to an Amazon ElastiCache cluster from EC2 instances within a multi-tier web application, both located in separate VPCs in the us-east-1 Region. What is the MOST cost-effective solution to achieve this?
A
Establish a VPC peering connection and set up route tables and security group rules accordingly.
B
Utilize a Transit VPC for routing and configure route tables and security group rules.
C
Implement a VPC peering connection with specific security group rules for the peering connection.
D
Employ a Transit VPC for routing and apply security group rules to the Transit VPC.