Question: In a V2X Application Enabler (VAE) architecture, what additional protocol may be utilized for delivering Notifications between a VAE server and a service consumer, as per 3GPP specifications?
Option 1: FTP (File Transfer Protocol)
Option 2: Websocket (as defined in IETF RFC 6455)
Option 3: SMTP (Simple Mail Transfer Protocol)
Option 4: SSH (Secure Shell) Protocol
Explanation: The correct answer is Websocket, as it is specifically mentioned as an optional method for delivering Notifications in a VAE setup, leveraging the IETF RFC 6455 standard. This approach enables bidirectional, real-time communication between the VAE server and service consumer, enhancing the efficiency of notification delivery in telecom networks, particularly in Vehicle-to-Everything (V2X) communications where timely information exchange is crucial.