The correct answer is to select subnets in different Availability Zones for each SAP component. This is the best practice for high availability because it ensures that if one Availability Zone fails, the SAP application and database can continue operating from another zone, eliminating a single point of failure. AWS Launch Wizard supports this by allowing you to choose existing subnets across multiple AZs during deployment, automatically configuring the necessary cross-zone redundancy. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this concept often appears in questions about high availability subnet selection using Launch Wizard, with a common trap being the assumption that all components can be placed in the same subnet for simplicity. Remember the memory tip: “Spread to survive” — always spread your subnets across AZs to keep SAP resilient.
PAS-C01 Migration Practice Question
This PAS-C01 practice question tests your understanding of migration. 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 migrating an SAP system to AWS and wants to use AWS Launch Wizard for deployment. They have an existing VPC and subnets. Launch Wizard requires the selection of a subnet for each component. What is the best practice for selecting subnets for high availability?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Select subnets in different Availability Zones to ensure high availability.
For high availability, it is best to deploy SAP components across multiple Availability Zones by selecting subnets in different AZs. Launch Wizard supports this. Deploying all in one AZ creates a single point of failure. Launch Wizard can use existing subnets.
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.
✗
Use only private subnets without public access.
Why it's wrong here
Does not address high availability.
✗
Select a single subnet in one Availability Zone for simplicity.
Why it's wrong here
This does not provide high availability.
✗
Create a new VPC and subnets specifically for Launch Wizard.
Why it's wrong here
Unnecessary; can use existing VPC.
✓
Select subnets in different Availability Zones to ensure high availability.
Why this is correct
This meets best practices for SAP high availability on AWS.
Clue confirmation
The clue word "best" in the question point toward this answer.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
Migration — This question tests Migration — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Select subnets in different Availability Zones to ensure high availability. — For high availability, it is best to deploy SAP components across multiple Availability Zones by selecting subnets in different AZs. Launch Wizard supports this. Deploying all in one AZ creates a single point of failure. Launch Wizard can use existing subnets.
What should I do if I get this PAS-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 PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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