Question: What is the purpose of the Visited Country FQDN in a roaming UE scenario?
Option 1: To determine whether the visited country mandates the selection of an ePDG.
Option 2: To identify the MCC of the home network of the UE.
Option 3: To authenticate the UE with the visited network.
Option 4: To establish a secure tunnel between the UE and the ePDG.
Explanation: The Visited Country FQDN is used by a roaming UE to determine whether the visited country mandates the selection of an ePDG in this country. This allows the UE to make informed decisions about its connectivity options while roaming.