Question: What is used to globally identify an RNC in a UTRAN or GERAN operating in Iu mode?
Option 1: Only the PLMN-Id
Option 2: Only the RNC-Id
Option 3: The combination of the PLMN-Id and the RNC-Id
Option 4: The SRNC-Id
Explanation: In a UTRAN or GERAN operating in Iu mode, the RNC is globally identified by combining the PLMN-Id (Public Land Mobile Network Identifier) with the RNC-Id (RNC Identifier). This ensures unique identification of the RNC across different networks.