Question: What is the primary purpose of the 'First RLS Indicator' Information Element (IE) in UTRAN's Iur interface RNSAP signalling?
Option 1: To indicate the quality of the initial radio link established towards a User Equipment (UE).
Option 2: To signify whether a specific Radio Link and its set should be considered as the first links established with a UE.
Option 3: To request additional resources for the first radio link in a Radio Link Set.
Option 4: To notify the UE about an impending handover to a new Radio Link Set.
Explanation: The correct answer, Option 2, highlights the First RLS Indicator IE's role in identifying if a specific Radio Link (and its associated set) is the initial connection established with a User Equipment (UE), crucial for managing and optimizing radio resources in UTRAN networks.