Question: In a Stand-alone Non-Public Network (SNPN), how is the SMF Set FQDN constructed when using the Network Identifier (NID), if the MNC has only 2 significant digits?
Option 1: set<Set Id>.smfset.5gc.nid<NID>.mnc0<MNC>.mcc<MCC>.3gppnetwork.org (inserting one "0" at the right side of the MNC)
Option 2: set<Set Id>.smfset.5gc.nid<NID>.mnc<MNC>.mcc<MCC>.3gppnetwork.org (using the 2-digit MNC as is)
Option 3: set<Set Id>.smfset.5gc.nid<NID>.mnc<MNC>0.mcc<MCC>.3gppnetwork.org (appending one "0" at the end of the MNC)
Option 4: set<Set Id>.smfset.5gc.nid<NID>.mnc0<MNC>.mcc<MCC>.3gppnetwork.org (inserting one "0" at the left side of the MNC)
Explanation: According to the specification, if there are only 2 significant digits in the MNC, one "0" digit shall be inserted at the **left side** to fill the 3 digits coding of MNC in the SMF Set FQDN. This ensures consistency in the formatting of the MNC within the domain name, particularly important for parsing and processing by network elements.