AWS Certified Solutions Architect - Associate
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A solutions architect is designing a VPC with multiple subnets for applications using Amazon EC2 and Amazon RDS. The VPC has six subnets across two Availability Zones, each with a public, private, and database-specific subnet. EC2 instances in private subnets must have access to RDS databases. What configuration ensures this?
A
Exclude public subnet routes in a new route table for database subnets.
B
Attach a security group to DB instances that blocks traffic from the public subnet's security group.
C
Attach a security group to DB instances that permits traffic from the private subnet's security group.
D
Establish peering connections: one between public and private subnets, another between private and database subnets.