What is the MOST likely solution?
Assign a public IP address to the database server and restart the database engine.
Create and attach an Internet gateway to the VPC. Create a route table for the EC2 instance’s subnets that sends Internet traffic to the gateway.
Create and attach a virtual private gateway to the VPC. Create a route table for the EC2 instances’ subnets that sends Internet traffic to the gateway.
Create a VPC peering connection to a VPC that has an Internet gateway attached. Create a route table for the EC2 instances’ subnets that sends Internet traffic to the peered VPC.
Explanations:
Assigning a public IP to the RDS instance is not recommended, as RDS instances in a Multi-AZ deployment are not designed to be publicly accessible. The issue is likely with EC2 instance outbound connectivity, not the RDS instance itself.
Creating an Internet gateway and routing traffic from the EC2 instances to it allows the EC2 instances to access external services via the public internet. This resolves the issue of EC2 instances not connecting to external services.
A virtual private gateway is used to connect to on-premises networks via VPN. It does not solve the issue of EC2 instances needing outbound internet access. This would not affect the EC2 instances’ access to external services.
VPC peering is used to connect two VPCs but does not provide a direct path to the internet unless one of the VPCs has an Internet gateway. It is not a suitable solution for enabling EC2 instances to connect to external services.
I plot that the answer is:
Create and attach an Internet gateway to the VPC. Create a route table for the EC2 instance’s subnets that sends Internet traffic to the gateway.