Question: Under what conditions does a User Equipment (UE) initiate the failure reporting procedure in an Evolved Universal Terrestrial Radio Access Network (E-UTRA)?
Option 1: Upon successful handover to a new cell and completion of the security authentication process.
Option 2: When the UE detects Radio Link Control (RLC) failure or a Dual Active Protocol Stack (DAPS) Handover (HO) failure.
Option 3: After receiving a specific command from the Mobility Management Entity (MME) to report all past failures.
Option 4: Upon experiencing a prolonged period of inactivity on the radio interface and then re-establishing connection.
Explanation: The correct answer, Option 2, aligns with the specified conditions for initiating the failure reporting procedure: detecting Radio Link Control (RLC) failure or encountering a Dual Active Protocol Stack (DAPS) Handover (HO) failure. These conditions directly relate to the reliability and continuity of the radio access network connection, making them critical triggers for reporting failures to ensure network integrity and user experience.