SAA-C03 Q389 · DNS

Question

A solutions architect is designing a system to be highly resilient. The system uses Amazon Route 53 with health checks and an Application Load Balancer (ALB). The system is critical and must have the highest availability possible. Which solution will meet these requirements?

Accepted Answer

**Option B: Configure Route 53 health checks to perform a failover automatically.**

This is correct because Route 53 has a **built-in failover routing policy** that is specifically designed for this exact use case:

1. **Requirement: Highest availability** → Route 53 failover routing is a native, fully managed DNS-based failover mechanism.
2. **Requirement: Highly resilient** → Route 53 health checks continuously monitor the health of your primary endpoint (ALB). If the primary becomes unhealthy, Route 53 **automatically** routes traffic to the secondary (standby) resource.
3. **Requirement: No manual intervention** → The failover is entirely automatic. Route 53 health checkers distributed globally poll your endpoint at configurable intervals (10s or 30s). When a threshold of checkers rep

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🏗️ Architecture

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🔒 Security

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