Question: In a V2X Application Enabler (VAE) Services context, what is the mandatory protocol version supported over TLS for HTTP communications?
Option 1: HTTP/1.1
Option 2: HTTP/2
Option 3: Both HTTP/1.1 and HTTP/2 are mandatory
Option 4: The choice between HTTP/1.1 and HTTP/2 is left to the V2X application server
Explanation: Support for HTTP/1.1 over TLS is explicitly stated as mandatory, whereas support for HTTP/2 is recommended but not required, indicating that only HTTP/1.1 is universally obligatory for all implementations in this context.