A solutions architect configured a VPC with a small range of IP addresses. As the number of Amazon EC2 instances in the VPC grows, there are insufficient IP addresses for future workloads. Which solution resolves this issue with the LEAST operational overhead?
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Correct answer: Add an additional IPv4 CIDR block to increase the number of IP addresses and create additional subnets in the VPC. Create new resources in the new subnets by using the new CIDR..
Why this is the answer
The most straightforward solution with the least operational overhead is to extend the existing VPC by adding a secondary IPv4 CIDR block. This allows you to create new subnets within the same VPC, providing more IP addresses for new EC2 instances without needing to manage inter-VPC connectivity or routing complexities. Resources within the same VPC can communicate seamlessly. Creating a second VPC (whether with peering, Transit Gateway, or VPN) introduces additional networking components, routing tables, security group considerations across VPCs, and management overhead that are unnecessary if the goal is simply to expand IP address space for the same logical network. These options are more suitable for connecting distinct, isolated networks or for complex hub-and-spoke architectures.
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