PAS-C01 Technology Practice Question
A company is running SAP HANA in a multi-node scale-out configuration on AWS. The cluster uses AWS Placement Groups with the 'cluster' placement strategy. The system is experiencing network latency between nodes. Which change should the company make to reduce latency?
⚠ Common exam trap
Test-takers frequently confuse bandwidth with latency, assuming larger instances or storage optimizations will fix network latency, when the real fix is reducing driver overhead via Enhanced Networking.
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
✓
Enable Enhanced Networking (ENA) on all instances in the cluster.
Enabling Enhanced Networking (ENA) on all instances reduces network latency and jitter by offloading network processing to dedicated hardware on the Elastic Network Adapter. For SAP HANA scale-out clusters requiring low-latency inter-node communication, ENA provides higher packet-per-second performance and lower latency compared to the default Xen-net driver, directly addressing the latency issue in the cluster placement group.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the placement group to 'spread' to reduce interference.
Why it's wrong here
Spread placement groups place instances on different hardware, increasing latency.
- ✗
Use larger instance sizes to increase network bandwidth.
Why it's wrong here
Larger instances have higher bandwidth but not necessarily lower latency.
- ✓
Enable Enhanced Networking (ENA) on all instances in the cluster.
Why this is correct
ENA provides higher throughput and lower latency for inter-node communication.
- ✗
Use EBS-optimized instances to improve storage performance.
Why it's wrong here
EBS optimization improves storage I/O, not network latency.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.