Question: What is the primary purpose of constructing a Visited Country Fully Qualified Domain Name (FQDN) for a roaming User Equipment (UE) in a telecommunications network?
Option 1: To authenticate the UE's identity with the home network
Option 2: To determine the optimal routing path for data packets
Option 3: To identify available Wi-Fi access points in the visited country
Option 4: To determine if the visited country requires selection of an Evolved Packet Data Gateway (ePDG) within its borders
Explanation: The Visited Country FQDN is used by a roaming UE to ascertain whether the country it is currently in mandates the use of an ePDG, crucial for secure data transmission and compliance with local regulations, ensuring seamless and compliant connectivity for roaming users.