- A
Place all SAP servers in public subnets and use security groups to restrict access
Why wrong: Public subnets expose servers to the internet, which is not a security best practice.
- B
Place the web dispatchers in private subnets and use a NAT Gateway for internet access
Why wrong: NAT gateways provide outbound internet, not inbound, and private subnets cannot be directly accessed from the internet.
- C
Place all servers in private subnets and use an Application Load Balancer for internet access
Why wrong: An ALB in a private subnet cannot be accessed from the internet; it must be in a public subnet.
- D
Place the web dispatchers in public subnets, the application servers in private subnets, and use a Network Load Balancer in front of the web dispatchers
This design provides internet access to web dispatchers via a public-facing NLB while keeping application servers private.
Quick Answer
The correct configuration is to place the web dispatchers in public subnets with an Internet Gateway route, the SAP application servers in private subnets, and a Network Load Balancer (NLB) in front of the web dispatchers. This works because the SAP web dispatchers public subnet NLB topology ensures direct internet accessibility for the dispatchers while keeping the application servers secure from direct exposure. The NLB provides layer 4 load balancing and health checks, preserving the client IP for logging and security, which is critical for SAP traffic patterns. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of hybrid network segmentation and the specific role of the NLB as a reverse proxy for web dispatchers. A common trap is choosing an Application Load Balancer, which does not preserve client IP at layer 4 and adds unnecessary HTTP overhead. Memory tip: think "Public dispatchers, private apps, NLB in front" — the NLB is the gatekeeper that keeps the dispatchers’ IPs hidden while maintaining client IP transparency.
PAS-C01 Design of SAP Workloads on AWS Practice Question
This PAS-C01 practice question tests your understanding of design of sap workloads on aws. 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.
An architect is designing a network topology for an SAP system on AWS. The SAP application servers must be placed in private subnets, and the web dispatchers must be accessible from the internet. Which configuration should the architect use to meet these requirements?
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
Place the web dispatchers in public subnets, the application servers in private subnets, and use a Network Load Balancer in front of the web dispatchers
Option D is correct because web dispatchers need direct internet accessibility, which is achieved by placing them in public subnets with an Internet Gateway route. The SAP application servers must remain in private subnets for security, and a Network Load Balancer (NLB) in front of the web dispatchers provides layer 4 load balancing and health checks without exposing the dispatchers' IPs directly, while preserving client IP for logging and security.
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.
- ✗
Place all SAP servers in public subnets and use security groups to restrict access
Why it's wrong here
Public subnets expose servers to the internet, which is not a security best practice.
- ✗
Place the web dispatchers in private subnets and use a NAT Gateway for internet access
Why it's wrong here
NAT gateways provide outbound internet, not inbound, and private subnets cannot be directly accessed from the internet.
- ✗
Place all servers in private subnets and use an Application Load Balancer for internet access
Why it's wrong here
An ALB in a private subnet cannot be accessed from the internet; it must be in a public subnet.
- ✓
Place the web dispatchers in public subnets, the application servers in private subnets, and use a Network Load Balancer in front of the web dispatchers
Why this is correct
This design provides internet access to web dispatchers via a public-facing NLB while keeping application servers private.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume an Application Load Balancer (ALB) is always the best choice for internet-facing web traffic, but for SAP Web Dispatchers, a Network Load Balancer (NLB) is required because ALBs cannot handle non-HTTP protocols like DIAG and RFC, and they modify headers in ways that break SAP session persistence.
Detailed technical explanation
How to think about this question
SAP Web Dispatchers act as reverse proxies for HTTP/HTTPS and also for SAP-specific protocols like DIAG (port 3200) and RFC (port 3300), which require TCP-level load balancing without payload inspection. A Network Load Balancer (NLB) operates at layer 4, preserving the original client IP and protocol, and can handle both TCP and UDP traffic, making it ideal for SAP workloads. In a real-world scenario, the NLB is deployed in public subnets with an Elastic IP, while the web dispatchers in public subnets receive traffic from the NLB via private IPs, ensuring high availability and scaling without exposing the dispatchers directly to the internet.
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
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
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Design of SAP Workloads on AWS — This question tests Design of SAP Workloads on AWS — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Place the web dispatchers in public subnets, the application servers in private subnets, and use a Network Load Balancer in front of the web dispatchers — Option D is correct because web dispatchers need direct internet accessibility, which is achieved by placing them in public subnets with an Internet Gateway route. The SAP application servers must remain in private subnets for security, and a Network Load Balancer (NLB) in front of the web dispatchers provides layer 4 load balancing and health checks without exposing the dispatchers' IPs directly, while preserving client IP for logging and security.
What should I do if I get this PAS-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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Last reviewed: Jun 24, 2026
This PAS-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 PAS-C01 exam.
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