ANS-C01 Question 415
Select 3An e-commerce company hosts its website using AWS, and they want to ensure high availability and reliability for their DNS resolution in case of server or region failures. Which Route 53 configurations can they use to achieve this objective?
- A
Enable Route 53 health checks and configure a failover routing policy
- B
Set up a multivalue answer routing policy with health checks enabled
- C
Use a weighted routing policy to distribute traffic equally across all servers
- D
Configure Route 53 with a geolocation routing policy to direct users to the nearest region
- E
Deploy a Route 53 latency-based routing policy to route traffic to the region with the lowest latency
Show answer and explanation
Correct answers: A, B, E
Explanation
To ensure reliability and high availability using Route 53, enabling health checks and combining them with routing policies like failover, multivalue answer, or latency-based routing is critical. These configurations provide mechanisms to route traffic away from unhealthy endpoints and optimize user experience. Weighted and geolocation routing policies, while useful in specific scenarios, do not inherently provide reliability features unless paired with additional configurations like health checks.
- A. Correct.
Health checks combined with a failover routing policy ensure that traffic is automatically routed to a healthy endpoint if the primary endpoint becomes unavailable, improving reliability.
- B. Correct.
A multivalue answer routing policy with health checks can return multiple IP addresses for redundancy and remove unhealthy endpoints, increasing availability and reliability.
- C. Incorrect.
Weighted routing is used to distribute traffic based on pre-defined weights, but it does not inherently provide failover or reliability mechanisms unless paired with health checks or other configurations.
- D. Incorrect.
Geolocation routing directs traffic based on user location but does not inherently provide high availability or failover capabilities for reliability.
- E. Correct.
Latency-based routing optimizes performance by directing users to the region with the lowest latency and can improve reliability when paired with health checks.