Question: What is the primary purpose of using Tracking/Location Area Identity based ePDG FQDN in a Public Land Mobile Network (PLMN)?
Option 1: To enhance security for User Equipment (UE) authentication
Option 2: To support location-based evolved Packet Data Gateway (ePDG) selection within a PLMN
Option 3: To optimize network resource allocation for voice services
Option 4: To facilitate international roaming between different PLMNs
Explanation: The correct answer highlights the main objective of using Tracking/Location Area Identity based ePDG FQDN, enabling location-based selection of an ePDG within a PLMN for efficient network operation, especially in scenarios requiring location-specific services or routing.