ANS-C01 Network Design Practice Question
A company is designing a multi-region active-active architecture for a web application using Application Load Balancers (ALBs) and AWS Global Accelerator. The application must provide low-latency access to users worldwide and automatically route traffic to healthy endpoints. Which design should be used?
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that DNS-based routing (Route 53) can achieve the same low-latency and fast failover as Global Accelerator, but candidates overlook the impact of DNS TTLs and client-side caching on failover speed and routing consistency.
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
✓
Deploy Global Accelerator with endpoints in each region (ALBs) and configure health checks to route traffic to healthy endpoints.
Global Accelerator uses the AWS global network and Anycast IPs to direct traffic to the nearest healthy endpoint, providing low-latency access and automatic failover across regions. By configuring ALBs as endpoints in each region with health checks, Global Accelerator ensures traffic is routed only to healthy endpoints, meeting the active-active multi-region requirement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use Amazon CloudFront with multiple origins pointing to ALBs in each region and configure origin failover.
Why it's wrong here
CloudFront origin failover is for origin redundancy, not active-active multi-region routing.
- ✗
Use Amazon Route 53 latency-based routing with health checks to route traffic to ALBs in each region.
Why it's wrong here
Route 53 latency routing does not use anycast and may not provide optimal performance for all users.
- ✗
Deploy a single ALB with multiple target groups across regions using cross-zone load balancing.
Why it's wrong here
ALB cannot have target groups in other regions.
- ✓
Deploy Global Accelerator with endpoints in each region (ALBs) and configure health checks to route traffic to healthy endpoints.
Why this is correct
Global Accelerator uses anycast IPs and health checks for optimal routing to healthy endpoints.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.