You are creating a design that will connect your single on-premises data center to a VPC in Google Cloud by using an IPsec VPN connection. The connection must have a minimum SLA of 99.99%. There is a single VPN termination device located in your on-premises data center. The VPN termination device can be configured only with a single public IP address. Your design must also have the least amount of setup effort. What should you do?
https://cloud.google.com/network-connectivity/docs/vpn/concepts/topologies#:~:text=To%20meet%20the%2099.9%25%20availability,of%20the%20Compute%20Engine%20VM. Caution: To receive the 99.99% availability SLA, configure at least one tunnel on each HA VPN gateway interface. Configuring only one tunnel from a single HA VPN interface to a single interface on the peer gateway doesn't provide enough redundancy to meet the availability SLA because there is an unused interface on the HA VPN gateway, which does not have a tunnel configured on it.
D is correct.
Option D is the only one that correctly identifies the necessary HA VPN gateway and describes the specific configuration needed to terminate both tunnels on a single on-premises public IP address, which is a supported method for achieving 99.99% SLA under the given constraints.