The correct answer is to deploy SAProuter on an EC2 instance with an Elastic IP address. This approach preserves SAProuter functionality during migration to AWS because the Elastic IP provides a static, publicly routable endpoint that remains unchanged even if the underlying instance is stopped or replaced, ensuring that existing SAProuter rules and partner firewall configurations continue to work without disruption. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of how to maintain stable network paths for legacy SAP components that require fixed IP addresses, a common trap being to confuse SAProuter with HTTP load balancers or NAT gateways. Remember that SAProuter operates at the network layer with its own proprietary protocol, so it cannot be replaced by an Application Load Balancer or a NAT Gateway, which lack support for SAProuter’s connection handling. A useful memory tip: “Elastic IP keeps the SAProuter rulebook intact.”
PAS-C01 Migration Practice Question
This PAS-C01 practice question tests your understanding of migration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is migrating an SAP NetWeaver system to AWS. The system uses SAProuter for secure network communication. What is the recommended approach to preserve the SAProuter functionality during the migration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy SAProuter on an EC2 instance with an Elastic IP address
Option C is correct because deploying SAProuter on an EC2 instance with an Elastic IP ensures a stable endpoint and maintains existing SAProuter rules. Option A is wrong because a NATGateway does not support SAProuter directly. Option B is wrong because a VPN connection does not replace SAProuter. Option D is wrong because an Application Load Balancer is for HTTP/HTTPS traffic, not SAProuter.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Deploy SAProuter on an EC2 instance with an Elastic IP address
Why this is correct
EC2 with Elastic IP provides a stable endpoint and allows existing SAProuter rules to be reused.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use an AWS NAT Gateway to route traffic
Why it's wrong here
NATGateway is for outbound traffic, not for SAProuter's specific routing.
✗
Establish an AWS Site-to-Site VPN connection
Why it's wrong here
VPN is for network connectivity, not for SAProuter's application-level routing.
✗
Use an AWS Application Load Balancer
Why it's wrong here
ALB does not support SAProuter protocols (saprfc).
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
Migration — This question tests Migration — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Deploy SAProuter on an EC2 instance with an Elastic IP address — Option C is correct because deploying SAProuter on an EC2 instance with an Elastic IP ensures a stable endpoint and maintains existing SAProuter rules. Option A is wrong because a NAT Gateway does not support SAProuter directly. Option B is wrong because a VPN connection does not replace SAProuter. Option D is wrong because an Application Load Balancer is for HTTP/HTTPS traffic, not SAProuter.
What should I do if I get this PAS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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