Question: Which of the following functions is NOT a primary role of the SIP core in supporting mission critical services, as per its architectural composition?
Option 1: Service Control (application service selection)
Option 2: Rendezvous (contact address binding and URI resolution)
Option 3: Data Transfer Management (payload routing and forwarding)
Option 4: Network Element Authentication
Explanation: The SIP core's primary functions include rendezvous (for contact address binding and URI resolution) and service control (for application service selection). Data Transfer Management, specifically payload routing and forwarding, is more closely related to the media plane rather than the signaling control functions attributed to the SIP core.