Question: What is the primary purpose of the VAL user ID in the Service Enabler Architecture Layer for Verticals (SEAL)?
Option 1: To uniquely identify a VAL User Equipment (VAL UE) across all SEAL services.
Option 2: Exclusively for mapping to a specific VAL service provider's network infrastructure.
Option 3: Solely to indicate the VAL service agreement between the VAL user and a single VAL service provider.
Option 4: For authentication, authorization, and to represent the VAL user within the VAL service, potentially across multiple VAL service providers.
Explanation: The correct answer is Option 4 because the VAL user ID serves multiple critical purposes: it authenticates and authorizes the VAL user for the VAL service, represents the user uniquely within the service, and can be associated with multiple VAL service providers with whom the user has agreements. This multifaceted role underscores its importance in both security and service accessibility across potentially several providers.