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PAS-C01 Migration Practice Question

A company is migrating a legacy application to AWS. The application requires a static IP address that must not change after migration. Which networking component should be used to ensure the application's public IP remains consistent?

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 address

An Elastic IP address is a static public IPv4 address that can be associated with an EC2 instance or a Network Load Balancer, ensuring the application's public IP remains consistent. Option B (Internet Gateway) is used for VPC internet access but does not provide a static IP. Option C (VPC Peering) is for connecting VPCs. Option D (NAT Gateway) is for outbound traffic.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Elastic IP address

    Why this is correct

    An Elastic IP address is a static public IPv4 address that can be associated with an EC2 instance or a Network Load Balancer, ensuring the application's public IP remains consistent.

  • Internet Gateway

    Why it's wrong here

    An Internet Gateway is used for VPC internet access but does not provide a static IP address.

  • VPC Peering

    Why it's wrong here

    VPC Peering is used to connect VPCs, not to provide a static public IP.

  • NAT Gateway

    Why it's wrong here

    A NAT Gateway is used for outbound traffic from private subnets and does not provide a static public IP.

Visual reference

Inside (Private) PC-A 10.0.0.1 PC-B 10.0.0.2 NAT Router Outside (Public) 203.0.113.1 Inside Global Server PAT: many private IPs share one public IP via unique port numbers

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JA

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.