The correct answer is TCP segmentation offloading (TSO) enabled on the HANA database instance. TSO allows the network interface card to break large TCP segments into smaller ones, but when oversized segments are delivered to the SAP application server that cannot reassemble them properly—often due to MTU mismatches or insufficient receive-side offload support—packet loss and high latency occur. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of how network offload features interact with SAP HANA workloads in the same Availability Zone, where you might otherwise assume low latency. A common trap is to blame security groups or routing, but the real culprit is often a NIC-level offload setting. Memory tip: TSO = Too Segmented, Oversized—if the receiver can’t handle big chunks, packets drop.
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. 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.
An SAP application on AWS is experiencing high network latency and packet loss between the SAP application server and the SAP HANA database. The application and database are in the same AWS Region and Availability Zone. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
TCP segmentation offloading (TSO) is enabled on the HANA database instance.
C is correct because TCP segmentation offloading (TSO) on the HANA database instance can cause the network interface to deliver oversized TCP segments to the SAP application server, which may not handle them correctly, leading to packet loss and high latency. This is a known issue in SAP on AWS environments where TSO offloads segmentation to the NIC, but if the receiving side lacks proper support or the network path has MTU mismatches, fragmentation and retransmissions occur.
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.
✗
Jumbo frames are enabled on the application server but not on the database server.
Why it's wrong here
Mismatched MTU can cause issues, but jumbo frames generally improve performance.
✗
The instances are not in a placement group.
Why it's wrong here
Placement groups actually reduce latency.
✓
TCP segmentation offloading (TSO) is enabled on the HANA database instance.
Why this is correct
TSO can cause performance issues with HANA; it's recommended to disable it.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Elastic Network Adapter (ENA) driver is not installed.
Why it's wrong here
ENA improves performance; its absence would cause other issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume jumbo frames or placement groups are the root cause of latency and packet loss, but the real issue is a TCP offload feature (TSO) causing segment size mismatches, which is a subtle but common problem in SAP HANA on AWS deployments.
Detailed technical explanation
How to think about this question
TSO allows the NIC to segment large TCP packets into MTU-sized chunks, reducing CPU load on the sender. However, if the receiver's NIC or driver does not support TSO or has a different offload configuration, the receiver may receive segments that exceed its reassembly buffer, causing drops and retransmissions. In SAP HANA, this is often mitigated by disabling TSO on the database instance using `ethtool -K ethX tso off` to ensure consistent packet sizes across the network path.
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.
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: TCP segmentation offloading (TSO) is enabled on the HANA database instance. — C is correct because TCP segmentation offloading (TSO) on the HANA database instance can cause the network interface to deliver oversized TCP segments to the SAP application server, which may not handle them correctly, leading to packet loss and high latency. This is a known issue in SAP on AWS environments where TSO offloads segmentation to the NIC, but if the receiving side lacks proper support or the network path has MTU mismatches, fragmentation and retransmissions occur.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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