- A
Register the ALB with subnets in at least two Availability Zones.
ALB requires multiple AZs for HA.
- B
Configure the VPC route tables to allow cross-AZ traffic.
Why wrong: VPCs allow cross-AZ traffic by default.
- C
Create a target group that includes instances from both Availability Zones.
Target group must include instances in all AZs where ALB is enabled.
- D
Assign a security group that allows traffic from both AZs.
Why wrong: Security groups are not AZ-specific.
- E
Place the ALB in a single subnet for simplicity and attach multiple ENIs.
Why wrong: Single subnet is a single point of failure.
Question 1,051 of 1,705
ANS-C01 Network Management and Operations Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 deploying a multi-tier application across two Availability Zones. The web tier must be highly available and scale based on traffic. The application load balancer (ALB) is internet-facing. Which TWO configurations are required to ensure the ALB can route traffic to the web instances across both AZs?
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
✓
Register the ALB with subnets in at least two Availability Zones.
Options A and C are correct. The ALB must be associated with subnets in at least two Availability Zones to achieve high availability. Additionally, the target group must contain instances from both AZs to allow the ALB to route traffic across zones. Option B is incorrect because VPC route tables already allow cross-AZ traffic by default; no special configuration is needed. Option D is incorrect because security groups are applied to instances, not to AZs, and ALBs use security groups to control inbound traffic. Option E is incorrect because placing the ALB in a single subnet would limit its availability to one AZ, defeating high availability.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Register the ALB with subnets in at least two Availability Zones.
Why this is correct
ALB requires multiple AZs for HA.
Related concept
CIDR notation defines the prefix length.
- ✗
Configure the VPC route tables to allow cross-AZ traffic.
Why it's wrong here
VPCs allow cross-AZ traffic by default.
- ✓
Create a target group that includes instances from both Availability Zones.
Why this is correct
Target group must include instances in all AZs where ALB is enabled.
Related concept
CIDR notation defines the prefix length.
- ✗
Assign a security group that allows traffic from both AZs.
Why it's wrong here
Security groups are not AZ-specific.
- ✗
Place the ALB in a single subnet for simplicity and attach multiple ENIs.
Why it's wrong here
Single subnet is a single point of failure.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related ANS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
- →
Network Management and Operations — study guide chapter
Learn the concepts, then practise the questions
- →
Network Management and Operations practice questions
Targeted practice on this topic area only
- →
All ANS-C01 questions
1,705 questions across all exam domains
- →
AWS Certified Advanced Networking Specialty ANS-C01 study guide
Full concept coverage aligned to exam objectives
- →
ANS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related ANS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Management and Operations practice questions
Practise ANS-C01 questions linked to Network Management and Operations.
Network Security, Compliance and Governance practice questions
Practise ANS-C01 questions linked to Network Security, Compliance and Governance.
Network Design practice questions
Practise ANS-C01 questions linked to Network Design.
Network Implementation practice questions
Practise ANS-C01 questions linked to Network Implementation.
ANS-C01 fundamentals practice questions
Practise ANS-C01 questions linked to ANS-C01 fundamentals.
ANS-C01 scenario practice questions
Practise ANS-C01 questions linked to ANS-C01 scenario.
ANS-C01 troubleshooting practice questions
Practise ANS-C01 questions linked to ANS-C01 troubleshooting.
Practice this exam
Start a free ANS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Management and Operations — This question tests Network Management and Operations — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Register the ALB with subnets in at least two Availability Zones. — Options A and C are correct. The ALB must be associated with subnets in at least two Availability Zones to achieve high availability. Additionally, the target group must contain instances from both AZs to allow the ALB to route traffic across zones. Option B is incorrect because VPC route tables already allow cross-AZ traffic by default; no special configuration is needed. Option D is incorrect because security groups are applied to instances, not to AZs, and ALBs use security groups to control inbound traffic. Option E is incorrect because placing the ALB in a single subnet would limit its availability to one AZ, defeating high availability.
What should I do if I get this ANS-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related ANS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More ANS-C01 practice questions
- A financial services company has a VPC with a public subnet and a private subnet. EC2 instances in the private subnet ne…
- A company is designing a network security architecture for a multi-account environment using AWS Transit Gateway. The se…
- A company is using AWS Direct Connect to connect its on-premises network to AWS. The company wants to encrypt all traffi…
- A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks via AWS Site-to-Site VPN. The secur…
- A company runs a web application on EC2 instances behind an Application Load Balancer (ALB). The application must be acc…
- A global e-commerce company uses a hub-and-spoke network topology with a transit VPC in us-east-1. Each spoke VPC has an…
Last reviewed: Jun 20, 2026
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
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.