Question: What is the primary purpose of the PLMN identity of the CN operator information element in a shared network or multi-operator core network (MOCN) with common GERAN?
Option 1: To indicate the UE's current location to the CN.
Option 2: To authenticate the UE before accepting the GPRS attach request.
Option 3: To prioritize traffic based on the operator's identity.
Option 4: To identify the PLMN of the CN operator that accepted the GPRS attach or routing area update request.
Explanation: The correct answer is Option 4 because the PLMN identity of the CN operator information element is used to indicate which PLMN has accepted the UE's GPRS attach or routing area update request in a shared network or MOCN with common GERAN, allowing for proper routing and handling of the UE's traffic.