The number of accounts and Regions is growing and CIDR assignments are beginning to overlap.
Track assigned and available address space centrally.
Which service is most appropriate?
Use Amazon VPC IP Address Manager (IPAM) to plan, allocate, and monitor VPC CIDR ranges.
Detailed explanation
CDN resource counts do not represent VPC address ranges.
CDN resource counts do not represent VPC address ranges.
DNS records do not track actual VPC CIDR utilization or conflicts.
DNS records do not track actual VPC CIDR utilization or conflicts.
IPAM centralizes CIDR planning, allocation, overlap detection, and utilization information.
IPAM centralizes CIDR planning, allocation, overlap detection, and utilization information.
An S3 bucket name is not an address-management control.
An S3 bucket name is not an address-management control.
Check official documentation
Compare the following points with the official documentation.
Amazon VPC IP Address Managerの公式説明を確認する。
What to confirm
IPAMとRoute 53の名前解決を区別できる。
Key points
- VPC IPAM
- CIDR
- Overlap detection
Notes
- Environment: AWS公式SOA-C03試験ガイドとAWS公式ドキュメントの確認
- Confirm current AWS service behavior in the official documentation.
Foundation review
Address governance
Central allocation prevents overlapping ranges before networks are connected.
Inventory versus DNS
IPAM tracks network ranges; Route 53 tracks names and records.