You have three on-premises networks connected to a Basic Azure Virtual WAN that contains one virtual hub and a VPN gateway limited to 1 Gbps throughput. Site-to-Site VPN connections from on-premises use this Virtual WAN. You must increase total throughput to 3 Gbps while minimizing administrative overhead. What should you do?

Increasing the number of gateway scale units is the correct solution because it directly scales the throughput of the existing VPN gateway within the Basic Virtual WAN. Each scale unit provides 500 Mbps of aggregate throughput, so increasing from 2 to 6 scale units (2 existing + 4 new) would achieve the desired 3 Gbps (6 500 Mbps). This minimizes administrative overhead as it modifies the existing gateway rather than deploying new resources or changing the Virtual WAN SKU. Upgrading to Standard SKU is unnecessary as Basic supports multiple scale units. Adding another VPN gateway would increase complexity and management. Creating an additional virtual hub is not needed to increase throughput for existing connections.