Question: In UTRAN Iu interface, which of the following statements accurately describes the direction and signaling bearer mode for the RANAP Enhanced Relocation Information Response message?
Option 1: Sent from RNC to UE, Signaling Bearer Mode: Dedicated Channel
Option 2: Exchanged between RNCs, Signaling Bearer Mode: Dedicated Channel
Option 3: Exchanged between RNCs, Signaling Bearer Mode: Not Applicable
Option 4: Sent from UE to RNC, Signaling Bearer Mode: Shared Channel
Explanation: The RANAP Enhanced Relocation Information Response message is exchanged between two Radio Network Controllers (RNCs) during enhanced relocation procedures, and its signaling bearer mode is specified as 'Not Applicable', highlighting its role in inter-RNC communication for efficient handover processes.