Question: In Mission Critical Video (MCVideo) services utilizing dynamic MBMS (Multimedia Broadcast Multicast Service) bearer establishment, what is the primary purpose of mapping group communication to an MBMS bearer by the MCVideo server?
Option 1: To prioritize unicast transmissions over broadcast for individual clients
Option 2: To enable billing for each recipient in a group call separately
Option 3: To secure the transmission with end-to-end encryption for each client
Option 4: To efficiently distribute media packets and transmission control messages to receiving MCVideo clients in group calls
Explanation: The correct answer, Option 4, highlights the efficient distribution of both media packets and transmission control messages to all recipients in a group call via a single MBMS bearer. This approach optimizes network resources by avoiding the need for multiple unicast transmissions, which is particularly beneficial in scenarios where bandwidth efficiency is crucial, such as in mission-critical communications. The other options are incorrect because they do not align with the primary purpose of using dynamic MBMS bearers in MCVideo services as described.