AWS Certified Advanced Networking - Specialty
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A company has deployed a NAT gateway in a single Availability Zone (AZ1) within a VPC (VPC1) to enable internet access for Amazon EC2 workloads located in private subnets across three Availability Zones (AZ1, AZ2, AZ3). Each subnet's route table is configured to route internet-bound traffic through the NAT gateway.
During a recent outage, internet access for the EC2 workloads failed due to the unavailability of the NAT gateway. A network engineer needs to implement a solution that eliminates this single point of failure and ensures built-in redundancy in the architecture.
Which solution will fulfill these requirements?
A
Set up two NAT gateways. Place each NAT gateway in a different public subnet in separate Availability Zones (AZ2 and AZ3). Configure a route table for private subnets to route traffic to the virtual IP addresses of the two NAT gateways.
B
Set up two NAT gateways. Place each NAT gateway in a different public subnet in separate Availability Zones (AZ2 and AZ3). Configure a route table to point the AZ2 private subnets to the NAT gateway in AZ2. Configure the same route table to point the AZ3 private subnets to the NAT gateway in AZ3.
C
Create a second VPC (VPC2). Set up two NAT gateways. Place each NAT gateway in a different VPC (VPC1 and VPC2) and in the same Availability Zone (AZ2). Configure a route table in VPC1 to point the AZ2 private subnets to one NAT gateway. Configure a route table in VPC2 to point the AZ2 private subnets to the second NAT gateway.
D
Set up two NAT gateways. Place each NAT gateway in a different public subnet in separate Availability Zones (AZ2 and AZ3). Configure a route table to point the AZ2 private subnets to the NAT gateway in AZ2. Configure a second route table to point the AZ3 private subnets to the NAT gateway in AZ3.