Which type of VPN routes packets through virtual tunnel interfaces for encryption and forwarding?

The type of VPN that routes packets through virtual tunnel interfaces for encryption and forwarding is the IPsec virtual tunnel interface. This is largely because IPsec creates encrypted virtual tunnels between specific endpoints, allowing for secure transmission of data over potentially insecure networks.

The IPsec virtual tunnel interface is particularly effective in implementing a site-to-site VPN or a remote access VPN. It encapsulates the data packets within a secure tunnel before they are transmitted over the internet or other public networks. By using a virtual tunnel interface, it integrates seamlessly with the existing routing capabilities of a network, enabling standard routing protocols to operate over the encrypted tunnel, enhancing its functionality and security.

This design ensures that the original packets are protected, and upon reaching the destination, they are decrypted and forwarded to the intended recipient. This process makes the IPsec virtual tunnel interface a robust choice for organizations seeking secure communications across their networks.