PAS-C01 Technology Practice Question
A company runs SAP S/4HANA on AWS. The system is critical and requires high availability. The database is SAP HANA running on two EC2 instances in a cluster. The company wants to ensure that the secondary instance can take over quickly in case of primary failure. Which AWS service should be used to implement a floating IP address that can be moved between the instances?
⚠ Common exam trap
It's easy for candidates to assume Route 53 is the only way to implement failover with a fixed endpoint. However, the requirement is for a floating IP address that moves between instances, which is exactly what Elastic IP addresses provide. Route 53 changes DNS records, not the IP address itself.
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
✓
Elastic IP addresses
Elastic IP addresses are static public IPv4 addresses that can be allocated to an AWS account and reassigned between EC2 instances. When a primary SAP HANA instance fails, the Elastic IP can be disassociated from the failed instance and associated with the secondary instance. This provides a floating IP that can be moved quickly, supporting high availability. Route 53 DNS failover changes DNS resolution, but does not provide a floating IP address that is directly moved between instances.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Global Accelerator
Why it's wrong here
AWS Global Accelerator improves performance by directing traffic to the nearest edge location, but it does not provide a floating IP that can be moved between instances. It is not designed for failover within a cluster.
- ✗
Amazon Route 53
Why it's wrong here
Amazon Route 53 can route traffic to healthy endpoints using DNS failover, but it does not provide a floating IP address. The DNS name resolves to an IP address, but the IP itself is not moved; clients must wait for DNS propagation. This is not a floating IP.
- ✓
Elastic IP addresses
Why this is correct
Elastic IP addresses are the appropriate AWS service for a floating IP that can be moved between EC2 instances. They can be reassigned quickly via the AWS console, CLI, or scripts, allowing the secondary instance to take over the same IP address upon primary failure.
- ✗
VPC Peering
Why it's wrong here
VPC Peering connects VPCs for routing traffic, but it does not provide a floating IP address for failover between instances within a single VPC.
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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.