Question: In IOPS mode for Public Safety, which reference points are utilized by the MCPTT service when employing pre-established MBMS bearers as per 3GPP specifications?
Option 1: MCPTT-IOPS-1, MCPTT-IOPS-3, and MC-IOPS-5
Option 2: MCPTT-IOPS-2, MCPTT-IOPS-4, and MC-IOPS-6
Option 3: MCData-IOPS-2, MCData-IOPS-4, and MC-IOPS-6
Option 4: MCPTT-IOPS-1, MCData-IOPS-3, and MC-IOPS-7
Explanation: This question requires understanding of the specific reference points designated for Mission Critical Push To Talk (MCPTT) services within the Isolated Operation for Public Safety (IOPS) mode when utilizing pre-established Multimedia Broadcast Multicast Service (MBMS) bearers. The correct answer, MCPTT-IOPS-2, MCPTT-IOPS-4, and MC-IOPS-6, is specified in the context of IOPS operations for efficiently managing group sessions over MBMS bearers, highlighting the importance of precise reference point utilization in mission-critical communications to ensure reliable and efficient service delivery.