Question: What is a prerequisite for external applications to access Mission Critical (MC) services in an MC system?
Option 1: Physical Connectivity to the MC System
Option 2: Authentication and Authorization via IP Connectivity
Option 3: Subscription to a Specific MC Service Plan
Option 4: Direct Access to MC System's Core Network
Explanation: To ensure secure access, external applications must undergo authentication and authorization processes before accessing MC services when connecting via IP connectivity, highlighting the importance of secure remote access protocols in telecom networks.