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Answer: Expand the VPC's IP address range by adding an extra IPv4 CIDR block and creating new subnets for additional resources.
Option A is the correct answer because it involves adding an additional IPv4 CIDR block to the existing VPC. This solution increases the IP address capacity while maintaining the simplicity of a single VPC setup, reducing operational overhead. It allows for seamless expansion by simply appending more subnets and deploying new resources without the complexities of inter-VPC connectivity, which options B, C, and D would require.
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In a scenario where a VPC has an IP address limitation due to its small CIDR block, and the growing number of EC2 instances necessitates more IP addresses, what is the least operationally complex solution to expand the IP address capacity?
A
Expand the VPC's IP address range by adding an extra IPv4 CIDR block and creating new subnets for additional resources.
B
Create a secondary VPC with a larger CIDR block, establish a peering connection, and reroute traffic to utilize the new VPC's subnets for resource deployment.
C
Deploy an AWS Transit Gateway to interconnect with the existing VPC, updating routing to include the new gateway and allocate resources in the extended network.
D
Construct a new VPC and connect it to the existing one via a Site-to-Site VPN, using Amazon EC2 for the VPN solution, and reroute traffic through this VPN for resource deployment in the new VPC.
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