To enhance availability, a company has expanded its public cloud presence to multiple regions from a single CSP. The company wants to ensure resources in the public cloud are highly available to…

Direct peering connections (dedicated circuits) offer lower latency, higher throughput, and greater reliability than VPN tunnels over the public internet. Having two separate direct connections provides physical path redundancy so that a single circuit failure does not disrupt access, and the CSP's internal multi-region infrastructure independently handles the geographic redundancy of the hosted resources - so headquarters connectivity does not need to span both regions to achieve high availability.

Routing both VPN connections through a single ISP introduces that ISP as a single point of failure, and VPN tunnels over the public internet are inherently less reliable and performant than dedicated direct connections.

Although dual VPN connections over two separate ISPs to both regions add ISP diversity, VPN tunnels are less reliable and performant than dedicated circuits, making this option inferior to direct peering for a high-availability requirement.

Dual direct connections over a single ISP still leaves that ISP as a single point of failure - an ISP outage would sever both connections simultaneously despite the connections reaching both cloud regions.