Questions 46 to 48

Question 46

A company is transitioning its web presence into the AWS cloud. As part of the migration, the company will be running a web application both on-premises and in AWS for a period of time. During the co-existence period, the client would like 80% of the traffic to hit the AWS-based web servers and 20% to be directed to the on-premises web servers.

What method can a solutions architect use to distribute traffic as requested?

1. Use Route 53 with a weighted routing policy, and configure the respective weights.
2. Use Route 53 with a simple routing policy.
3. Use an Application Load Balancer to distribute traffic based on IP address.
4. Use a Network Load Balancer to distribute traffic based on the Instance ID.

Correct Answer: 1

Explanation: Route 53 weighted routing policy is similar to simple, but you can specify a weight per IP address. You create records with the same name and type and assign each record a relative weight, which is a numerical value that favors one IP over another (values must total 100). To stop sending traffic to a resource, you can change the weight of the record to 0.

CORRECT: “Use Route 53 with a weighted routing policy, and configure the respective weights.” is the correct answer.

INCORRECT: “Use Route 53 with a simple routing policy.” is incorrect as this will not split traffic based on weights as required.

INCORRECT: “Use an Application Load Balancer to distribute traffic based on IP address.” is incorrect. Application Load Balancer can distribute traffic to AWS and on-premise resources using IP addresses but cannot be used to distribute traffic in a weighted manner.

INCORRECT: “Use a Network Load Balancer to distribute traffic based on Instance ID.” is incorrect. Network Load Balancer can distribute traffic to AWS and on-premise resources using IP addresses (not Instance IDs).

References: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html