Which protocol is commonly used for creating Site-to-Site VPNs in Aviatrix?

The correct answer is IPsec (Internet Protocol Security), which is widely recognized for its robustness in securing Internet Protocol communications by authenticating and encrypting each IP packet in a communication session. IPsec is particularly well-suited for creating Site-to-Site VPNs because it provides a strong framework for both secure data transmission and integrity checks, enabling organizations to establish secure connections between different sites over the internet or other unsecured networks.

This protocol supports various encryption algorithms and protocols, allowing for flexible configurations tailored to meet specific security requirements. In the context of Aviatrix, using IPsec ensures that data traveling between two different network locations is protected against interception and tampering, making it a preferred choice for establishing Site-to-Site VPNs.

The other protocols listed serve different purposes or have limitations that make them less suitable for this specific application. For instance, L2TP often requires an additional layer of security like IPsec to provide encryption, whereas PPTP is generally considered less secure due to its vulnerabilities. SSTP, while providing good security, is less commonly used for site-to-site configurations compared to IPsec, which is a more established standard in this domain.