Question: In a UTRAN Iur interface, what is the significance of the first PLMN listed in the Multiple PLMN List information element for MOCN (Multi-Operator Core Network) and GWCN (Gateway Core Network) shared configurations?
Option 1: It represents the secondary carrier's identity for roaming purposes.
Option 2: It identifies the mandatory, common PLMN broadcasted in the Master Information Block (MIB).
Option 3: It signifies the primary operator's ID in a shared infrastructure setup.
Option 4: It is reserved for future use in evolving network architectures.
Explanation: In MOCN and GWCN configurations, the first PLMN in the Multiple PLMN List denotes the common, mandatory PLMN Identity broadcasted to User Equipment (UEs), ensuring seamless network identification and access across shared infrastructures.