Azure's networking service that provides optimized and automated branch-to-branch connectivity through Azure.
Virtual WAN connects multiple office locations to Azure cloud resources with optimized routing.
All four are managed WAN connectivity services that centralize branch/VPC/VNet connectivity, routing, and policy. Azure Virtual WAN uses hubs and partner/managed connectivity (VPN/ExpressRoute/SD-WAN) to connect sites and VNets; AWS Cloud WAN and OCI Cloud WAN provide global network segmentation and routing across regions/accounts; GCP Network Connectivity Center acts as a hub for hybrid connectivity and spoke networks.