Question: What is the primary purpose of the PC5-RAT-Type AVP (AVP code 4604) in the context of V2X communication?
Option 1: To indicate the PC5 radio technology used for V2X communication over the PC5 reference point.
Option 2: To signal a Diameter error due to an unknown V2X subscription associated with an IMSI.
Option 3: To define the type of Enumerated value for V2X subscription in the HSS.
Option 4: To perform handover between different radio access technologies (RATs) in V2X scenarios.
Explanation: The PC5-RAT-Type AVP is specifically designed to identify the PC5 radio technology utilized for Vehicle-to-Everything (V2X) communication, ensuring proper configuration and compatibility over the PC5 interface. This aligns with the need for precise technological specification in telecommunications to facilitate effective data exchange, particularly in critical applications like V2X where reliability and speed are paramount.