Design a VPN between two Google Cloud VPCs (must include a VPN tunnel) to maximize availability per Google best practices. Which VPN configuration should you choose?
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Correct answer: BGP-based VPN using HA VPN between the two VPCs..
Why this is the answer
The correct choice is BGP-based VPN using HA VPN between the two VPCs because HA VPN provides a highly available, redundant VPN connection with two tunnels from a single gateway, automatically distributing traffic across them. BGP dynamically exchanges routes, ensuring automatic failover and optimal routing in case of a tunnel or peer device failure, which is crucial for maximizing availability. Classic VPN is a legacy solution that does not offer the same level of availability or redundancy as HA VPN. Policy-based and route-based VPNs, while functional, do not inherently provide the dynamic routing and automatic failover capabilities of BGP, making them less suitable for maximizing availability in a dynamic cloud environment.
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