Which protocol does the SD-WAN REST API use to communicate with network devices?

The SD-WAN REST API primarily uses HTTP (Hypertext Transfer Protocol) for communication. RESTful APIs are designed to be stateless and leverage standard HTTP methods (GET, POST, PUT, DELETE) to interact with resources on network devices. While SSL/TLS (Secure Sockets Layer/Transport Layer Security) is often used with HTTP to encrypt the communication (resulting in HTTPS), SSL itself is a security protocol, not the application-layer protocol for the API. IPsec is a suite of protocols used for securing IP communications at the network layer, not directly for API calls. SSH is a secure shell protocol primarily used for remote command-line access or secure file transfers, not for RESTful API interactions.