Question: In the context of Generic Authentication Architecture (GAA) and Generic Bootstrapping Architecture (GBA), what is a required input for the Nhss_GbaSDM_Get service operation to fetch GBA User Security for an end user?
Option 1: NF Type
Option 2: End User's IMSI (International Mobile Subscriber Identity)
Option 3: Requested Data Type for GBA
Option 4: Authentication Credentials of the NF Consumer
Explanation: According to the Generic Bootstrapping Architecture specifications, for the Nhss_GbaSDM_Get service operation, the NF Type is a mandatory input. This ensures that only authorized network functions (NFs) can request and fetch sensitive GBA User Security data for end users, thereby maintaining security and access control within the telecom network.