Question: In IMS, when a network service hosted on an Application Server (AS) utilizes both Ut interface for user configuration and Media Resource Function Controller (MRFC) capabilities, how does the AS typically interact with the MRFC for service configuration?
Option 1: The AS directly supports MRFC capabilities internally, eliminating the need for external communication.
Option 2: The AS communicates with the MRFC using a standardized interface defined in the current Release.
Option 3: The AS uses the Ut interface to relay configuration to the UE, which then forwards it to the MRFC.
Option 4: The interaction between the AS and MRFC for service configuration is not predefined and may vary.
Explanation: According to the provided context, when a network service uses both Ut interface and MRFC capabilities, the Application Server (AS) either supports Media Resource Function Controller (MRFC) capabilities internally or communicates with an external MRFC. The correct answer highlights the scenario where the AS has internal support for MRFC capabilities, thus not requiring separate communication with an MRFC for this aspect. This demonstrates an understanding of how services can be configured and managed within the IMS framework, particularly when leveraging both user-configurable aspects (via Ut) and media resource functionalities.