Question: Where can the Identity Management Server (IdMS) functional entity, responsible for authenticating Mission Critical (MC) IDs, potentially reside in relation to the user's MC system?
Option 1: In the same domain as the user's MC system
Option 2: Exclusively in a separate, isolated domain for enhanced security
Option 3: Only within the core network of the telecommunications provider
Option 4: Mandatorily in a cloud environment for scalability
Explanation: The correct answer is Option 1 because, according to the specifications for mission-critical services, the Identity Management Server (IdMS), which authenticates MC IDs by verifying user-supplied credentials, may reside in the same domain as the user's Mission Critical (MC) system. This highlights the flexibility in deployment while ensuring security and functionality for critical communications.