ANS-C01 Network Implementation Practice Question
A company is designing a multi-region active-active application using Application Load Balancers (ALBs) and AWS Global Accelerator. Which TWO configurations are required to route traffic to the correct regional endpoint based on the client's location?
⚠ Common exam trap
A common mix-up: candidates confuse DNS-based routing (Route 53 latency routing) with Global Accelerator's Anycast-based routing, assuming both achieve the same result, but Global Accelerator provides faster failover and more consistent performance by avoiding DNS caching and using the AWS backbone.
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
✓
Define endpoint groups in Global Accelerator for each region.
Endpoint groups in AWS Global Accelerator define the regional endpoints (such as ALBs) and allow you to control traffic routing based on the client's source location. Global Accelerator uses the Anycast IP addresses and the AWS global network to direct traffic to the nearest endpoint group, providing performance-based routing without relying on DNS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Define endpoint groups in Global Accelerator for each region.
Why this is correct
Endpoint groups specify the regional endpoints and traffic distribution.
- ✗
Enable AWS Shield Advanced on the ALBs.
Why it's wrong here
Shield Advanced provides DDoS protection, not routing.
- ✓
Create an AWS Global Accelerator accelerator with endpoints in both regions.
Why this is correct
Global Accelerator uses anycast IPs for proximity routing.
- ✗
Configure cross-region load balancing in the ALB target groups.
Why it's wrong here
ALB target groups are regional and do not support cross-region load balancing.
- ✗
Configure Amazon Route 53 latency-based routing to the ALBs.
Why it's wrong here
Global Accelerator handles routing, not Route 53.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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