Question: In UTRAN Iur interface RNSAP signalling, what is the primary scope of applicability for the Downlink (DL) Transport Format Combination Set?
Option 1: Both Uplink and Downlink Transport Channels
Option 2: Downlink (DL) Transport Channels exclusively
Option 3: Only for Coded Composite Transport Channels in Uplink
Option 4: All types of Transport Channels regardless of link direction
Explanation: The DL Transport Format Combination Set is specifically defined as being applicable to Downlink (DL) Transport Channels, focusing on managing and defining allowed Transport Format Combinations for downlink communications from the network to the User Equipment (UE).