Question: What triggers the RLC receiver to send an RLC status report?
Option 1: Receipt of a complete RLC SDU
Option 2: Detection of a duplicate RLC SDU segment
Option 3: Expiration of a timer
Option 4: Detection of a missing RLC SDU or RLC SDU segment
Explanation: The RLC receiver can trigger an RLC status report after detecting a missing RLC SDU or RLC SDU segment, which is essential for ensuring reliable data transfer and maintaining the integrity of the data being transmitted.