Question: What is the primary mechanism enabling off-network video push communications between MCVideo clients, as per Mission Critical Video (MCVideo) architecture?
Option 1: Utilization of Cellular IoT (CIoT) Capabilities
Option 2: Deployment of Dedicated Core Network Infrastructure
Option 3: Proximity Services (ProSe) Capabilities
Option 4: Standardized Unicast/Multicast Routing Protocols
Explanation: Off-network video push in MCVideo leverages Proximity Services (ProSe) capabilities, allowing direct communication between devices without relying on the cellular network infrastructure. This is crucial for mission-critical scenarios where immediate, local communication is vital. ProSe enables the efficient, off-network exchange of video content among MCVideo clients, ensuring prompt dissemination of critical visual information in situations where traditional network connectivity might be compromised or insufficient.