Question: What is a key aspect of the Network Resource Model defined by the Core network resources Integration Reference Point (IRP) in terms of supported Core Network entities?
Option 1: It exclusively supports IMS parts of the Core Network.
Option 2: It supports all Core Network entities, including UTRAN/GERAN and IMS.
Option 3: It supports Core Network entities in the current 3GPP Release, excluding IMS parts.
Option 4: It only supports legacy Core Network entities from pre-3GPP Releases.
Explanation: The correct answer is Option 3 because the Network Resource Model must support Core Network entities in the current 3GPP Release, with a specific exemption for IMS parts of the CN, which are covered under different requirements.