What should a solutions architect do to meet these requirements?
Attach a Network Load Balancer to the Auto Scaling group.
Attach an Application Load Balancer to the Auto Scaling group.
Deploy an Amazon Route 53 record set with a weighted policy to route traffic appropriately.
Deploy a NAT instance that is configured with port forwarding to the EC2 instances in the Auto Scaling group.
Explanations:
A Network Load Balancer (NLB) is ideal for handling UDP traffic, which is commonly used in gaming applications. NLB operates at the transport layer (Layer 4), allowing it to efficiently distribute incoming UDP packets to the EC2 instances in the Auto Scaling group. It also supports dynamic scaling, making it suitable for applications that require scaling out and in based on traffic.
An Application Load Balancer (ALB) is designed for HTTP/HTTPS traffic and operates at Layer 7. It does not natively support UDP traffic, which makes it unsuitable for a gaming application that transmits data using UDP packets. Therefore, it cannot effectively route traffic for this use case.
While Amazon Route 53 can be used to manage DNS routing, a weighted policy does not provide the necessary capability to distribute UDP traffic directly. Route 53 does not handle traffic balancing for UDP packets or provide the necessary features for scaling applications dynamically in response to traffic changes.
A NAT instance with port forwarding is not an effective solution for scaling UDP traffic to EC2 instances in an Auto Scaling group. NAT instances are typically used for enabling outbound internet access for private subnets and do not inherently provide load balancing capabilities for UDP traffic. This setup would not efficiently manage traffic scaling.
Based on what I know, the answer is:
Attach a Network Load Balancer to the Auto Scaling group.