- A
Use a NAT Gateway and assign public IPs
Why wrong: NAT Gateway does not provide static IPs for instances; it's for outbound traffic.
- B
Use VPC endpoints to assign private IPs
Why wrong: VPC endpoints are for accessing AWS services privately, not for assigning IPs to instances.
- C
Use Elastic IP addresses and a private hosted zone in Amazon Route 53
EIPs provide static public IPs; private hosted zone maintains custom hostnames.
- D
Use AWS Global Accelerator to assign static IP addresses
Why wrong: Global Accelerator provides static IPs but for front-end traffic, not for internal hostnames.
Question 1,424 of 1,733
Retain Hostnames and IPs After SAP Migration to AWS
This PAS-C01 practice question tests your understanding of migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 landscape to AWS. They have a requirement to retain the same hostnames and IP addresses for the SAP application servers after migration. How can they achieve this?
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
✓
Use Elastic IP addresses and a private hosted zone in Amazon Route 53
To retain hostnames and IP addresses after migration, you can use Elastic IP addresses (EIPs) to assign static private IP addresses to the SAP application servers (although EIPs are typically public, you can associate them with instances in a VPC to provide a static private IP if you disable the public IP mapping). Then, configure a private hosted zone in Amazon Route 53 to map the existing hostnames to these static IPs. This way, applications can continue using the same hostnames and IPs. Option A (NAT Gateway) is incorrect because NAT Gateways are used for outbound internet traffic and do not provide static IPs for inbound connections to instances. Option B (VPC endpoints) is incorrect because VPC endpoints provide private connectivity to AWS services, not static IPs for instances. Option D (AWS Global Accelerator) is incorrect because it uses anycast IPs for traffic acceleration and does not assign static IPs directly to instances.
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.
- ✗
Use a NAT Gateway and assign public IPs
- ✗
Use VPC endpoints to assign private IPs
Why it's wrong here
VPC endpoints are for accessing AWS services privately, not for assigning IPs to instances.
- ✓
Use Elastic IP addresses and a private hosted zone in Amazon Route 53
- ✗
Use AWS Global Accelerator to assign static IP addresses
Why it's wrong here
Global Accelerator provides static IPs but for front-end traffic, not for internal hostnames.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
Quick reference
Common DNS Record Types
| Record | Purpose | Example |
|---|---|---|
| A | IPv4 address mapping | example.com → 93.184.216.34 |
| AAAA | IPv6 address mapping | example.com → 2606:2800::1 |
| CNAME | Alias to another hostname | www → example.com |
| MX | Mail server for domain | example.com → mail.example.com (priority 10) |
| TXT | Text data (SPF, DKIM, verification) | v=spf1 include:_spf.example.com ~all |
| NS | Authoritative name servers | example.com NS ns1.example.com |
| PTR | Reverse DNS (IP → hostname) | 34.216.184.93.in-addr.arpa → example.com |
| SOA | Zone authority record | Primary NS, admin email, serial, TTL defaults |
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.
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Migration — study guide chapter
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Migration practice questions
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
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: Use Elastic IP addresses and a private hosted zone in Amazon Route 53 — To retain hostnames and IP addresses after migration, you can use Elastic IP addresses (EIPs) to assign static private IP addresses to the SAP application servers (although EIPs are typically public, you can associate them with instances in a VPC to provide a static private IP if you disable the public IP mapping). Then, configure a private hosted zone in Amazon Route 53 to map the existing hostnames to these static IPs. This way, applications can continue using the same hostnames and IPs. Option A (NAT Gateway) is incorrect because NAT Gateways are used for outbound internet traffic and do not provide static IPs for inbound connections to instances. Option B (VPC endpoints) is incorrect because VPC endpoints provide private connectivity to AWS services, not static IPs for instances. Option D (AWS Global Accelerator) is incorrect because it uses anycast IPs for traffic acceleration and does not assign static IPs directly to instances.
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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Last reviewed: Jun 20, 2026
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