This ANS-C01 practice question tests your understanding of network design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is designing a multi-Region active-active application using Application Load Balancers (ALBs) in us-east-1 and eu-west-1, with Route 53 latency-based routing. Users report that after a failover, existing connections fail. What should the company implement to ensure seamless failover?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable sticky sessions (session affinity) on the ALBs with a cookie duration
Sticky sessions are required to maintain user sessions during failover. Route 53 latency routing alone does not preserve sessions. Option C is correct because ALB sticky sessions with a cookie duration keep users pinned to the same ALB. Option A is wrong because cross-Region VPC peering does not affect session persistence. Option B is wrong because client IP affinity is not supported across Regions. Option D is wrong because Global Accelerator does not provide session stickiness.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 a Global Accelerator instead of Route 53
Why it's wrong here
Global Accelerator does not provide session persistence.
✗
Enable client IP affinity on the ALBs
Why it's wrong here
Client IP affinity is only for Network Load Balancers and does not work across Regions.
✗
Use Amazon Route 53 geolocation routing instead of latency
Why it's wrong here
Geolocation routing does not solve session persistence.
✓
Enable sticky sessions (session affinity) on the ALBs with a cookie duration
Why this is correct
Sticky sessions ensure users are routed to the same ALB based on a cookie, maintaining session state.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable sticky sessions (session affinity) on the ALBs with a cookie duration — Sticky sessions are required to maintain user sessions during failover. Route 53 latency routing alone does not preserve sessions. Option C is correct because ALB sticky sessions with a cookie duration keep users pinned to the same ALB. Option A is wrong because cross-Region VPC peering does not affect session persistence. Option B is wrong because client IP affinity is not supported across Regions. Option D is wrong because Global Accelerator does not provide session stickiness.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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