Question: What is the primary purpose of the 5G S-Temporary Mobile Subscription Identifier (5G-S-TMSI) provided by the 5G Core Network (5GC) to a User Equipment (UE)?
Option 1: To permanently identify the UE across all network types for billing purposes.
Option 2: To authenticate the UE's identity during initial attachment procedures.
Option 3: To prioritize UE's data traffic within the Radio Access Network (RAN).
Option 4: To uniquely identify the UE within its current tracking area for mobility management.
Explanation: The correct answer, Option 4, highlights the 5G-S-TMSI's role in uniquely identifying a UE within its tracking area, which is crucial for efficient mobility management. This temporary identifier aids the network in managing UE location updates and paging without revealing the UE's permanent identity. Options 1, 2, and 3 are incorrect because they misrepresent the 5G-S-TMSI's purpose: it is not for permanent identification (Option 1), initial authentication (Option 2), or traffic prioritization (Option 3).