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Home Forums AWS AWS Certified Solutions Architect Professional Having an Alias Record to an ALB and having an non-Alias record to static EC2s

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  • Having an Alias Record to an ALB and having an non-Alias record to static EC2s

  • Nicklovn

    Member
    January 15, 2025 at 1:32 am

    This is the question and correct answer:

    A technology company runs an industrial chain orchestration software on the AWS cloud. It consists of a web application tier that is currently deployed on a fixed fleet of Amazon EC2 instances. The database tier is deployed on Amazon RDS. The web and database tiers are deployed in the public and private subnet of the VPC respectively. The company wants to improve the service to make it more cost-effective, scalable, highly available and should require minimal human intervention.

    Which of the following actions should the solutions architect implement to improve the availability and load balancing of this cloud architecture? (Select TWO.)”

    Answers:

    1. Create a Non-Alias Record in Route 53 with a Multivalue Answer Routing configuration and add all the IP addresses for your web servers.

    2. Place an Application Load Balancer in front of all the web servers. Create a new Alias Record in Route 53 which maps to the DNS name of the load balancer.

    The reason I’m confused is that I don’t understand how these two solutions are supposed to work together.. My understanding is that there is ambiguity for where Route53 should send traffic. When users navigate to example.com, how will Route53 know if it should send traffic to the ALB or handle the DNS resolution with the multivalue answer routing itself?

    Or is the question saying that these solutions are mutually exclusive?

  • Neil-TutorialsDojo

    Member
    January 15, 2025 at 1:33 pm

    Hello Nicklovn,

    Good day!

    The two solutions—using an Application Load Balancer (ALB) with an Alias Record and configuring Multivalue Answer Routing with Non-Alias Records—are both valid options, but they are not designed to be implemented together. Each solution provides a different approach to improve availability and load balancing.

    The ALB solution is better suited for scalable, dynamic environments with automated traffic distribution. At the same time, Multivalue Answer Routing involves configuring Route 53 to return multiple IP addresses of EC2 instances, with optional health checks.

    This question is intended to reflect the actual exam scenario, where you need to select appropriate solutions independently, not as a combined setup.

    I hope this helps.

    Regards,

    Neil @ tutorials dojo

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