Question: During Network Slice-Specific Authentication and Authorization on a Single Network Slice Selection Assistance Information (S-NSSAI), how does the Mobile Equipment (ME) determine the appropriate Slice Subscriber Identity Module (SSIM) to use?
Option 1: Based solely on the International Mobile Subscriber Identity (IMSI) stored on the Universal Integrated Circuit Card (UICC)
Option 2: By matching the S-NSSAI with a list of supported S-NSSAIs in the ME's firmware
Option 3: Using two criteria: (1) the Application Identifier (AID) being present in the Elementary File Directory (EFDIR) and identified as '3GPP SSIM', and (2) the S-NSSAI being listed in the application as described in the S-NSSAI list request
Option 4: Through a random selection from all available SSIM applications on the UICC
Explanation: The correct answer reflects the specified criteria for selecting an appropriate SSIM during Network Slice-Specific Authentication and Authorization procedures. These dual criteria ensure the ME uses an SSIM that is both properly identified as a '3GPP SSIM' within the EFDIR and associated with the specific S-NSSAI, facilitating secure and accurate network slice authentication and authorization.