Which solution will meet these requirements?
Configure the Lambda function to run in the VPC with the appropriate security group.
Set up a VPN connection from AWS to the data center. Route the traffic from the Lambda function through the VPN.
Update the route tables in the VPC to allow the Lambda function to access the on-premises data center through Direct Connect.
Create an Elastic IP address. Configure the Lambda function to send traffic through the Elastic IP address without an elastic network interface.
Explanations:
AWS Lambda functions can be configured to run inside a VPC, but this alone does not ensure access to on-premises resources. It requires proper routing (via Direct Connect) and security groups to facilitate the communication.
A VPN connection is not necessary if Direct Connect is already in place, as Direct Connect can handle routing traffic to the on-premises data center without the need for a VPN.
Updating the route tables in the VPC to route traffic through Direct Connect is the correct approach. The Lambda function must be configured in the VPC, and the routing must be set up for communication with the on-premises data center.
Elastic IP addresses are used for associating public IPs with EC2 instances or other resources that need internet-facing connectivity. Lambda functions in VPCs do not use Elastic IPs directly, and this approach does not solve the routing issue to the on-premises data center.
I value that the answer is:
Update the route tables in the VPC to allow the Lambda function to access the on-premises data center through Direct Connect.