
Explanation:
Box1: Standard
Basic virtual WAN supports Site-to-site VPN only
Standard virtual WAN supports
ExpressRoute
User VPN (P2S)
VPN (site-to-site)
Inter-hub and VNet-to-VNet transiting through the virtual hub
Azure Firewall
NVA in a virtual WAN
Box 2: 4
8 Gig Express Route. 2 GB per ER scale unit. Therefore number of scale units = 8/2 = 4 Express Route Scale Units and Connectivity: Similar in concept to VPN scale units, customers seeking to deploy Express Route connectivity into their Virtual WAN Hubs will incur costs for the scale units provisioned in that hub, with options ranging from 1 to 10 with each representing
2Gbps of ER throughput.
https://docs.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about
https://www.wwt.com/article/microsoft-azure-virtual-wan-cloud-networking-architecture