Question: What is the format of the NRF FQDN for an NRF in an operator's SNPN when the SUPI of the UE is of type IMSI?
Option 1: nrf.operator.com
Option 2: nrf.5gc.nid<NID>.mnc<MNC>.mcc<MCC>.3gppnetwork.org
Option 3: nrf.5gc.mnc<MNC>.mcc<MCC>.operator.com
Option 4: nrf.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org
Explanation: According to the text, when the SUPI of the UE is of type IMSI, the NID is not available to the NF. In this case, the NRF FQDN of an NRF in an operator's SNPN is that of the NRF of the PLMN that owns the MCC and MNC, which is nrf.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org.