Ops wants a single topology view of Transit Gateways, attachments, and on-prem devices across all regions and accounts — including DX and VPN status. Which service provides it?
A.VPC Reachability Analyzer
Reachability Analyzer tests paths between two resources — it isn't a fleet topology view.
B.AWS Cloud WAN / Network Manager
Correct. Network Manager is the centralized global-network console.
C.VPC Flow Logs
Flow Logs are per-ENI/subnet traffic records, not topology.
D.CloudWatch dashboards
Dashboards show chosen metrics — they don't build a network topology graph.
Why this answer
Network Manager (part of Cloud WAN) gives a global network view — topology maps, TGW registration, DX/VPN device monitoring, events — across accounts and regions.
Correct answer: B · Last reviewed 2026-10-26
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