PAS-C01 Technology Practice Question
An SAP system uses AWS Direct Connect to connect to on-premises systems. The SAP application servers are in a private subnet, and the HANA database is in a separate private subnet. Both subnets are in the same VPC. The application servers can connect to the HANA database, but the application servers cannot connect to an on-premises file server via the Direct Connect. The on-premises network team confirms that the file server is reachable from other on-premises resources. The VPC route tables have a route for the on-premises CIDR pointing to the Direct Connect virtual gateway. The security groups allow all outbound traffic. What is the MOST likely cause of the issue?
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
✓
The route table associated with the application subnet does not have a route to the on-premises CIDR via the virtual gateway.
The most likely cause is that the route table associated with the application subnet does not have a route to the on-premises CIDR via the virtual gateway. Since the application servers are in a different subnet, they need an explicit route in their subnet's route table to reach the on-premises network through Direct Connect. Without this route, traffic cannot be forwarded to the virtual gateway. Option A is unlikely because the security groups allow all outbound traffic, and NACLs might be blocking, but the question states security groups allow all outbound, and typically NACLs are configured permissive by default. Option C is not indicated as the on-premises team confirms the file server is reachable from other on-premises resources, implying Direct Connect is up. Option B (VPN) is not relevant; Direct Connect is already in use.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The network ACL for the application subnet is blocking outbound traffic to the on-premises CIDR.
Why it's wrong here
NACLs are stateless; if outbound is allowed, it should work.
- ✗
The on-premises file server is not reachable because it requires VPN instead of Direct Connect.
Why it's wrong here
Direct Connect is sufficient if properly configured.
- ✗
The Direct Connect virtual interface is in a 'down' state.
Why it's wrong here
If it were down, other on-premises resources would also be unreachable.
- ✓
The route table associated with the application subnet does not have a route to the on-premises CIDR via the virtual gateway.
Why this is correct
Missing route prevents traffic from reaching Direct Connect.
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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.