This ANS-C01 practice question tests your understanding of network implementation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 has a VPC with multiple subnets spanning three Availability Zones. They have deployed an Application Load Balancer (ALB) in the VPC and need to ensure high availability and scalability for a web application. Which of the following are design considerations for implementing the ALB in this environment? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the ALB in at least two Availability Zones to provide high availability.
Option A is correct because AWS requires an Application Load Balancer to be enabled in at least two Availability Zones to achieve high availability. If one AZ fails, the ALB can continue routing traffic to healthy targets in the remaining AZs, ensuring fault tolerance and compliance with the ALB's regional service model.
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.
✓
Enable the ALB in at least two Availability Zones to provide high availability.
Why this is correct
ALB must have targets in multiple AZs to be highly available.
Related concept
Read the scenario before looking for a memorised answer.
✓
Remove an Availability Zone from the ALB if the targets in that AZ are unhealthy.
Why this is correct
This prevents routing traffic to unhealthy targets.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the ALB to use subnets that span multiple Availability Zones.
Why it's wrong here
Subnets are specific to one AZ; ALB must have one subnet per AZ.
✗
Use VPC peering to connect the ALB to subnets in other VPCs.
Why it's wrong here
ALB is regional and does not use VPC peering.
✓
Enable cross-zone load balancing to evenly distribute traffic across all targets.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that subnets can span multiple Availability Zones or that VPC peering can directly integrate an ALB with subnets in another VPC, but both are architecturally invalid in AWS.
Detailed technical explanation
How to think about this question
Under the hood, the ALB's node is provisioned in each specified subnet, and cross-zone load balancing (option E) is enabled by default for ALBs, distributing traffic evenly across all registered targets regardless of AZ. This prevents uneven load distribution when targets in one AZ are overwhelmed while others are idle. The ALB uses a round-robin algorithm at the node level, and health checks are performed per target group to determine routing eligibility.
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.
TExam Day Tips
→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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the ALB in at least two Availability Zones to provide high availability. — Option A is correct because AWS requires an Application Load Balancer to be enabled in at least two Availability Zones to achieve high availability. If one AZ fails, the ALB can continue routing traffic to healthy targets in the remaining AZs, ensuring fault tolerance and compliance with the ALB's regional service model.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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