Question: In a V2X (Vehicle-to-Everything) application scenario, utilizing the VAE (V2X Application Enabler) services over a 5G system, what is the mandated protocol version and security requirement for HTTP communication?
Option 1: HTTP/2 with optional TLS
Option 2: HTTP/1.1 without TLS, but with an option for upgrade to HTTP/2
Option 3: HTTP/1.1 over mandatory TLS, with support for HTTP/2 being recommended
Option 4: HTTP/2 over mandatory TLS, with no support for HTTP/1.1
Explanation: This answer is correct because the specification mandates (requires) the use of HTTP/1.1 over TLS for VAE services in a V2X context, while also recommending (but not mandating) support for HTTP/2. The mandatory use of TLS ensures secure communication, aligning with the security aspects emphasized in related 3GPP specifications for advanced V2X services and the 5G system's security architecture.