PAS-C01 Migration Practice Question
A manufacturing company is migrating its SAP ECC system to AWS. The system includes an SAP HANA database (1 TB) and an SAP NetWeaver application server. They plan to use AWS Database Migration Service (DMS) for the database and AWS Application Migration Service (MGN) for the application server. The network connection is AWS Direct Connect with 1 Gbps bandwidth. During a test migration, the DMS task for the database fails with a connection error. The source database is on an on-premises server that is behind a firewall. The administrator has already opened the necessary ports in the firewall. The DMS replication instance is in a VPC with a public subnet. Which step should the administrator take to resolve the connection 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
✓
Configure the source database to allow connections from the DMS replication instance IP.
The DMS replication instance needs to establish a connection to the source database. Even if the necessary ports are open in the firewall, the source database itself may have an IP allowlist that must include the DMS instance's IP. Since the DMS instance is in a public subnet, it has a public IP. The administrator should configure the source database to allow connections from that IP. Option C is correct. Option B is misleading because a NAT gateway provides internet access, not connectivity to on-premises via Direct Connect; proper routing via a virtual private gateway is needed. Option A is incorrect because changing the port does not resolve network reachability. Option D is incorrect because the firewall ports are already open.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Modify the DMS source endpoint to use a different port.
Why it's wrong here
Changing the port does not address the underlying network connectivity issue; it only changes the port number.
- ✗
Create a private subnet for the DMS replication instance and attach a NAT gateway to allow outbound traffic to the on-premises database.
Why it's wrong here
A NAT gateway provides outbound internet access, not connectivity to an on-premises database over Direct Connect. The DMS instance needs a route to the on-premises network via a virtual private gateway or transit gateway, not a NAT gateway.
- ✓
Configure the source database to allow connections from the DMS replication instance IP.
Why this is correct
The source database likely has an IP allowlist. Even with open firewall ports, the database must accept connections from the DMS replication instance's IP address. Configuring this allows the connection.
- ✗
Open additional ports in the on-premises firewall.
Why it's wrong here
The administrator already confirmed that the necessary ports are open, so additional ports are not the issue.
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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.