The three components required to ensure high availability for SAP NetWeaver ASCS are a Network Load Balancer, a cluster manager like Pacemaker, and shared storage such as Amazon EFS or EBS. A Network Load Balancer distributes traffic to the ASCS instance and performs TCP health checks to detect failures, while Pacemaker manages the failover process between nodes, and shared storage provides a consistent /sapmnt and /usr/sap file system accessible by both nodes. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this question tests your understanding of the specific HA stack for SAP Central Services, often appearing as a multi-select item where distractors like an Application Load Balancer or NAT Gateway are intentionally wrong. A common trap is assuming an ALB works for ASCS, but it lacks the necessary TCP health check granularity for SAP’s enqueue and message servers. Memory tip: think “NLP” for NLB, Linux Pacemaker, and Persistent storage—the three pillars of ASCS high availability.
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. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 highly available SAP NetWeaver architecture on AWS. The system uses an SAP Central Services (ASCS) instance. Which THREE components are required to achieve high availability for the SAP 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
✓
Shared file storage (e.g., Amazon EFS or EBS Multi-Attach)
A cluster manager like Pacemaker handles failover. Shared storage (e.g., Amazon EFS or EBS) is needed for /sapmnt and /usr/sap. A Network Load Balancer distributes traffic and detects failures. Option B is wrong because NATGateway is for outbound internet. Option D is wrong because an Internet Gateway is for inbound internet. Option E is wrong because an ALB is not suitable for ASCS health checks; NLB is preferred.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Shared file storage (e.g., Amazon EFS or EBS Multi-Attach)
Why this is correct
Shared storage ensures data consistency after failover.
Related concept
Static NAT maps one inside address to one outside address.
✓
A cluster manager such as Pacemaker
Why this is correct
Pacemaker manages the failover of ASCS between nodes.
Related concept
Static NAT maps one inside address to one outside address.
✗
A NAT Gateway for outbound traffic
Why it's wrong here
NATGateway is not required for HA; it's for internet access.
✗
An Internet Gateway for inbound traffic
Why it's wrong here
Internet Gateway is for public internet access, not needed for HA.
✓
A Network Load Balancer to distribute traffic to ASCS
Why this is correct
NLB provides health checks and routes client requests to the active ASCS instance.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
Design of SAP Workloads on AWS — This question tests Design of SAP Workloads on AWS — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Shared file storage (e.g., Amazon EFS or EBS Multi-Attach) — A cluster manager like Pacemaker handles failover. Shared storage (e.g., Amazon EFS or EBS) is needed for /sapmnt and /usr/sap. A Network Load Balancer distributes traffic and detects failures. Option B is wrong because NAT Gateway is for outbound internet. Option D is wrong because an Internet Gateway is for inbound internet. Option E is wrong because an ALB is not suitable for ASCS health checks; NLB is preferred.
What should I do if I get this PAS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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