VPN Functionality: Site-to-Site VPN is specifically designed to create secure, private tunnels between on-premises networks and OCI VCNs. It uses industry-standard encryption protocols like IPsec to ensure data confidentiality and integrity during transmission.
Private Communication: Unlike FastConnect (private peering) which relies on dedicated physical connections, Site-to-Site VPN leverages the public internet for connectivity, bypassing potential security concerns associated with public internet exposure by employing robust encryption.
Flexibility: Site-to-Site VPN offers flexibility in deployment options, supporting both dynamic routing (BGP) and static routing for different use cases. It also allows you to connect multiple VCNs to your on-premises network through a single tunnel.
The other options are not suitable for creating a secure, encrypted connection between your on-premises network and an OCI VCN:
A). FastConnect: While offering dedicated, low-latency connectivity, FastConnect doesn,t encrypt traffic by default, exposing data to potential security risks.B. Service Gateway: Primarily used for managing outbound internet traffic within a VCN, not providing secure connections to external networks like your on-premises environment.D. Internet Gateway: Enables public internet access within a VCN, not intended for secure, private connections with external networks.