Question: What are the possible signalling bearer modes for the ERROR INDICATION message on the UTRAN Iu interface, as per RANAP signalling?
Option 1: Only Connection Oriented
Option 2: Both Connection Oriented and Connectionless
Option 3: Only Connectionless
Option 4: Neither Connection Oriented nor Connectionless
Explanation: The ERROR INDICATION message, used for indicating errors in the node on the UTRAN Iu interface, can be transmitted in either a connection-oriented or connectionless signalling bearer mode. This flexibility allows for adaptability based on network conditions and requirements when sending error notifications between the Radio Network Controller (RNC) and the Core Network (CN).