An enterprise needs centralized CIDR management — allocating non-overlapping address ranges to VPCs across accounts and tracking utilization. Which feature?
A.IPAM (VPC IP Address Manager)
Centralized IP planning/allocation = IPAM. Correct.
B.AWS Organizations tag policies
Tag policies enforce metadata — not address space.
C.Route53 Resolver rules
Resolver handles DNS forwarding — not CIDR allocation.
D.A spreadsheet of CIDRs
Manual tracking fails at scale — no overlap enforcement.
Why this answer
IPAM plans, tracks, and allocates IP space org-wide: hierarchical pools per region/business unit, automatic overlap detection, cross-account sharing via RAM — the enterprise CIDR governance tool.
Correct answer: A · Last reviewed 2026-11-05
Official AWS references
Practice this interactively
Answer without seeing the solution first in the Hybrid Connectivity practice session.
Practice Hybrid Connectivity