AWS Certified Advanced Networking – Specialty (ANS-C01)Network Management and OperationsEasy
An organization is migrating its on-premises applications to AWS. They use an existing IP address range (10.0.0.0/8) on-premises and want to extend this range into AWS using multiple VPCs. To avoid IP address conflicts and simplify routing, they plan to use non-overlapping subnets. However, they need a solution that allows them to allocate IP addresses for new EC2 instances and other network resources in a structured and automated way, ensuring that they don't accidentally provision resources with conflicting IPs. Which AWS service is designed to centrally manage and allocate IP address ranges for VPCs and their subnets?
- AAmazon Route 53 Resolver
- BAWS IP Address Manager (IPAM)
- CAWS Transit Gateway
- DAWS PrivateLink
Show answer & explanationAnswer & explanation
Correct answer: B. AWS IP Address Manager (IPAM)
AWS IP Address Manager (IPAM) is a VPC feature that makes it easier to plan, track, and monitor IP addresses across your AWS network. It allows you to centrally manage IP address allocations, ensuring non-overlapping CIDRs and automated IP address assignment for VPCs and subnets, which perfectly addresses the need for structured and automated IP address management.
Why the other options are wrong
- A. Amazon Route 53 Resolver provides DNS resolution for VPCs and on-premises networks but does not manage IP address allocation.
- C. AWS Transit Gateway connects VPCs and on-premises networks, simplifying routing, but it does not manage IP address allocation or prevent conflicts at the IPAM level.
- D. AWS PrivateLink provides private connectivity between VPCs, AWS services, and on-premises applications without exposing traffic to the public internet. It is not for IP address management.
AWS IP Address Manager (IPAM)
A VPC feature that enables centralized planning, tracking, and monitoring of IP addresses across AWS and hybrid networks, preventing overlaps and automating allocation.
- Centralized IP address management
- Prevents CIDR overlaps
- Automates IP allocation for VPCs and subnets
- Supports hybrid networks
Memory trick: IPAM: Your network's librarian, organizing all the IP addresses neatly.