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Exam AWS Certified Advanced Networking - Specialty ANS-C01 All Questions

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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 127 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 127
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company is deploying a web application into two AWS Regions. The company has one VPC in each Region. Each VPC has three Amazon EC2 instances as web servers behind an Application Load Balancer (ALB). The company already has configured an Amazon Route 53 public hosted zone for example.com. Users will access the application by using the fully qualified domain name (FQDN) of app.example.com.

The company needs a DNS solution that allows global users to access the application. The solution must route the users' requests to the Region that provides the lowest response time. The solution must fail over to the Region that provides the next-lowest response time if the application is unavailable in the initially intended Region.

Which solution will meet these requirements?

  • A. For each ALB, create an A record that has a geolocation routing policy to route app.example.com to the IP addresses of the ALB. Configure a Route 53 HTTP health check that monitors each ALB by IP address. Associate the health check with the A records.
  • B. Create an A record that has a geolocation routing policy to route app.example.com to the IP addresses for both ALBs. Configure a Route 53 health check that monitors TCP port 80 for each ALB by IP address. Associate the health check with the A records.
  • C. Create an A record that has a latency-based routing policy to route app.example.com as an alias to one of the ALBs. Configure a Route 53 health check that monitors TCP port 80 for each ALB by IP address. Associate the health check with the A records.
  • D. For each ALB, create an A record that has a latency-based routing policy to route app.example.com as an alias to the ALB. Set the value for Evaluate Target Health to Yes for the records.
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Suggested Answer: D 🗳️
by Balasmaniam at June 21, 2023, 10:30 a.m.
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Balasmaniam
Highly Voted 1 year, 3 months ago
D :- ans
upvoted 9 times
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vikasj1in
Most Recent 7 months ago
Selected Answer: D
Latency-Based Routing Policy: Latency-based routing is suitable for directing traffic to the AWS Region that provides the lowest latency or response time for users. This helps ensure that users are directed to the Region that can deliver the best performance. ALB Configuration: For each ALB, create an A record with a latency-based routing policy. This allows Route 53 to route traffic based on the latency observed from users' locations to the ALBs. Evaluate Target Health: Setting "Evaluate Target Health" to Yes ensures that Route 53 considers the health of the targets (ALBs) when making routing decisions. If the ALB in the initially intended Region becomes unavailable, Route 53 will automatically route traffic to the next healthiest Region.
upvoted 2 times
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Tofu13
1 year ago
Selected Answer: D
For both latency alias records, you set the value of Evaluate Target Health to Yes. This causes Route 53 to determine whether there are any healthy resources in a region before trying to route traffic there. https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-complex-configs.html
upvoted 2 times
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Certified101
1 year, 1 month ago
Selected Answer: D
D is correct
upvoted 3 times
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ISSDoksim
1 year, 1 month ago
agreed - D
upvoted 1 times
...

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