PAS-C01 Operations and Maintenance Practice Question
An SAP system on AWS is experiencing intermittent network connectivity issues between the application servers and the database server. Both are in the same VPC but different subnets. The security groups allow all traffic between them. What should the administrator check next?
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
✓
Network ACL rules for the subnets
Network ACLs are stateless and must allow both inbound and outbound traffic. If NACLs block return traffic, connectivity fails intermittently. VPC Flow Logs can help diagnose but are not the first check. Route tables are typically correct within a VPC. The issue is likely at the NACL level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Network ACL rules for the subnets
Why this is correct
NACLs are stateless and must allow ephemeral port return traffic.
- ✗
VPC Flow Logs to analyze dropped packets
Why it's wrong here
Flow Logs are useful but not the first step; check NACLs first.
- ✗
Route tables to ensure proper routing
Why it's wrong here
Routes within a VPC are usually correct; NACLs are more likely the issue.
- ✗
Security group rules for outbound traffic
Why it's wrong here
Security groups are stateful; outbound rules are less likely to cause intermittent issues.
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JA
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.