Question: What is the primary purpose of the EFOWSIDL (Operator controlled WLAN Specific Identifier List) file in a USIM application, when service n°63 is 'available'?
Option 1: To store a list of forbidden Public Land Mobile Networks (PLMNs) for roaming restrictions.
Option 2: To contain a prioritized list of WLAN specific identifiers (WSIDs) for guiding WLAN selection.
Option 3: To hold configuration settings for secure authentication protocols in WLAN environments.
Option 4: To manage the allocation of IP addresses for dual-stack (IPv4/IPv6) support in WLANs.
Explanation: The correct answer reflects the file's purpose: to contain an operator-preferred list of WLAN Specific Identifiers (WSIDs) in priority order for WLAN selection, guiding User Equipment (UE) to select the most appropriate WLAN based on the operator's preferences, enhancing network efficiency and user experience.