SAP-C02 Continuous Improvement for Existing Solutions Practice Question
Exhibit
Refer to the exhibit.
ResourceRecordSets:
- Name: example.com.
Type: A
AliasTarget:
HostedZoneId: Z2FDTNDATAQYW2
DNSName: myloadbalancer-1234567890.us-west-2.elb.amazonaws.com.
EvaluateTargetHealth: trueRefer to the exhibit. A company configured an Amazon Route 53 alias record for a domain name pointing to an Application Load Balancer (ALB). Users report that occasionally they are directed to an unhealthy ALB node. Which change should the company make to improve availability?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the ALB health check to mark unhealthy nodes.
The issue is that the ALB health check is not properly configured to mark unhealthy nodes. Although the Route 53 alias record has EvaluateTargetHealth set to true, Route 53 relies on the ALB's health check status to determine which targets are healthy. If the ALB health check is misconfigured (e.g., incorrect path, interval, or thresholds), it may not correctly report unhealthy nodes, causing Route 53 to occasionally route traffic to unhealthy nodes. Therefore, configuring the ALB health check to accurately mark unhealthy nodes (option B) is the direct solution. Option A (CNAME) is unsuitable for apex domains and doesn't provide health checking. Option C (weighted routing) distributes traffic proportionally but doesn't address health. Option D (multi-value answer routing) is for non-alias records and doesn't improve health checking beyond what alias records with EvaluateTargetHealth already offer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the record type to CNAME.
Why it's wrong here
CNAME does not support health checking.
- ✓
Configure the ALB health check to mark unhealthy nodes.
Why this is correct
Proper health checks ensure unhealthy nodes are not used.
- ✗
Use weighted routing policy.
Why it's wrong here
Weighted routing distributes traffic but does not check health.
- ✗
Use multi-value answer routing.
Why it's wrong here
Multi-value answer routing can return unhealthy IPs if not combined with health checks.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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