ANS-C01 Network Design Practice Question
A company is designing a multi-Region active-active application using Application Load Balancers (ALBs) behind AWS Global Accelerator. They require that traffic from a specific client IP address is always routed to the same AWS Region for session persistence. Which Global Accelerator feature should be used?
⚠ Common exam trap
Test-takers frequently confuse endpoint weights or traffic dials with session persistence, but these features only control traffic distribution ratios, not per-client stickiness.
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
✓
Enable client IP address affinity (sticky sessions).
Global Accelerator's client IP address affinity (sticky sessions) ensures that traffic from a specific client IP is consistently routed to the same endpoint (in this case, the same AWS Region) for the duration of the session. This feature uses a hash of the client IP to maintain stickiness, which is essential for session persistence in an active-active multi-Region setup.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure health checks on the endpoints.
Why it's wrong here
Health checks detect endpoint health, they do not provide session stickiness.
- ✓
Enable client IP address affinity (sticky sessions).
Why this is correct
Client IP address affinity ensures requests from a given client IP are consistently routed to the same endpoint.
- ✗
Assign endpoint weights to each ALB.
Why it's wrong here
Endpoint weights distribute traffic proportionally but do not guarantee a client sticks to one endpoint.
- ✗
Set traffic dials to 100% for both Regions.
Why it's wrong here
Traffic dials control the percentage of traffic sent to each endpoint group, not per-client stickiness.
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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.