PAS-C01 Design of SAP Workloads on AWS Practice Question
An SAP system on AWS is running on an r5.16xlarge instance. The system is experiencing network throughput bottlenecks. Which step should be taken to improve network performance?
⚠ Common exam trap
Many exam-takers assume changing to a larger or different instance type (like c5.18xlarge) will automatically increase network bandwidth, when in fact the root cause is the missing ENA driver, and the r5.16xlarge already supports the same 25 Gbps bandwidth once Enhanced Networking is enabled.
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 and install the ENA driver
Enabling Enhanced Networking and installing the Elastic Network Adapter (ENA) driver is the standard method to achieve higher packet-per-second (PPS) performance, lower latency, and increased network bandwidth on supported instance types like r5.16xlarge. Without the ENA driver, the instance uses the older Xen network driver, which cannot utilize the full 25 Gbps network bandwidth available to r5 instances, leading to throughput bottlenecks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Move the instance to a placement group
Why it's wrong here
Placement group reduces latency but not throughput.
- ✗
Attach an Elastic Fabric Adapter
Why it's wrong here
EFA is for tightly coupled HPC, not SAP.
- ✓
Enable Enhanced Networking and install the ENA driver
Why this is correct
ENA provides higher bandwidth and lower latency.
- ✗
Change the instance type to c5.18xlarge
Why it's wrong here
Compute optimized may not improve network throughput.
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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.