**What is Classic VPN?**\
\
In Google Cloud Platform (GCP), **Classic VPN** is the older VPN solution that provides secure connectivity between your on-premises network and your Google Cloud Virtual Private Cloud (VPC) network. It uses IPsec tunnels to establish encrypted connections. However, unlike HA VPN, Classic VPN does not offer built-in high availability or automatic failover across multiple gateways. Instead, it relies on manual setup for redundancy, making it less resilient compared to the newer HA VPN option.