Question: What is the primary purpose of the `Update_Session` service operation in the context of VAE (V2X Application Enabler) services?
Option 1: To initiate a new session for V2X communication between UE (User Equipment) and the VAE server.
Option 2: To trigger an update to an existing session-oriented service by the VAE server.
Option 3: To terminate an ongoing session due to inactivity or upon user request.
Option 4: To query the status of all active sessions managed by the VAE server.
Explanation: The `Update_Session` service operation is specifically designed to update an existing session, not to create a new one, terminate a session, or query session statuses. This highlights the importance of understanding the nuances of session management in telecom networks, particularly in specialized services like VAE.