ANS-C01 Question 413
Select 2An e-commerce company uses Amazon Route 53 to manage DNS for their public website. The company wants to ensure high availability and low latency for their users worldwide. They have two web servers located in different AWS Regions: us-east-1 and ap-southeast-1. How should they configure Route 53 to achieve their goals?
- A
Create latency-based record sets pointing to the web servers in us-east-1 and ap-southeast-1, and enable health checks for each record.
- B
Create weighted record sets with a 50/50 split between the web servers in us-east-1 and ap-southeast-1, and enable health checks for each record.
- C
Use geolocation routing to send traffic to the closest web server based on the user's country.
- D
Create a failover routing policy with the primary web server in us-east-1 and the secondary in ap-southeast-1, and enable health checks for the primary server.
- E
Set up multi-value answer routing with both web servers and enable health checks, allowing users to connect to healthy servers.
Show answer and explanation
Correct answers: A, E
Explanation
To achieve high availability and low latency, Route 53 latency-based routing and multi-value answer routing are the best options. Latency-based routing sends users to the closest (lowest latency) server, while enabling health checks ensures traffic is only sent to healthy resources. Multi-value answer routing also supports high availability by routing users to healthy servers, though it does not directly optimize for latency.
- A. Correct.
Correct. Latency-based routing is ideal for ensuring low-latency connections for users worldwide. Enabling health checks ensures traffic is only routed to healthy web servers.
- B. Incorrect.
Incorrect. Weighted routing splits traffic based on weights, which does not prioritize low latency. While health checks improve availability, this option does not achieve the latency goal.
- C. Incorrect.
Incorrect. Geolocation routing directs traffic based on location rather than latency, which may not always result in the lowest latency for users.
- D. Incorrect.
Incorrect. Failover routing ensures high availability by routing traffic to a secondary resource when the primary fails, but it does not optimize for latency.
- E. Correct.
Correct. Multi-value answer routing can provide high availability and low latency when combined with health checks, as it allows users to connect to any healthy server.