Question: In a UTRAN Iu interface, what is the primary purpose of the RELOCATION COMMAND message sent from the Core Network (CN) to the source Radio Network Controller (RNC)?
Option 1: To request resource allocation in the source RNC for handover preparation.
Option 2: To notify the source RNC of a relocation failure in the target system.
Option 3: To initiate the release of resources in the source RNC after a successful handover.
Option 4: To inform the source RNC that resources for relocation have been allocated in the target RNC or system.
Explanation: The RELOCATION COMMAND message informs the source RNC that resources for relocation have been allocated in the target RNC or system, ensuring seamless handovers by managing network resources during mobility events.