SOA-C02 Question 81
Select 2Your team has deployed a web application behind an Application Load Balancer (ALB) in multiple Availability Zones. You want to integrate Amazon Route 53 to route traffic to the ALB and ensure high availability by using health checks. Which of the following steps should you take to achieve this? (Select TWO.)
- A
Create an ALIAS record in Route 53 pointing to the ALB.
- B
Configure health checks in Amazon Route 53 to verify the health of individual EC2 instances behind the ALB.
- C
Enable health checks on the ALB to monitor the status of the target instances.
- D
Create a CNAME record in Route 53 pointing to the ALB.
- E
Configure Route 53 health checks to verify the health of the ALB.
Show answer and explanation
Correct answers: A, C
Explanation
To integrate Route 53 with an ALB for high availability, you should create an ALIAS record in Route 53 to point to the ALB, as ALIAS records are optimized for AWS resources. Additionally, health checks for the target instances should be set up on the ALB to ensure traffic is routed only to healthy instances. Route 53 does not directly monitor individual instances or the ALB itself; instead, it relies on the ALB's health check mechanisms.
- A. Correct.
Correct: You should create an ALIAS record in Route 53 pointing to the ALB. ALIAS records allow Route 53 to integrate directly with AWS resources like ALBs.
- B. Incorrect.
Incorrect: Route 53 does not monitor individual EC2 instances behind the ALB. Health checks for individual instances should be configured on the ALB instead.
- C. Correct.
Correct: ALBs are responsible for monitoring the health of the target instances. Configuring health checks on the ALB ensures traffic is routed only to healthy targets.
- D. Incorrect.
Incorrect: While CNAME records can be used for DNS entries, ALIAS records are specifically recommended for AWS resources such as ALBs to avoid additional DNS query costs.
- E. Incorrect.
Incorrect: Route 53 health checks are not designed to directly verify the health of the ALB. The ALB itself handles target instance health checks.