Question: What is the correct format for deriving a home network domain name from an IMSI with a 3-digit MNC?
Option 1: mnc<MNC>-mcc<MCC>.3gppnetwork.org
Option 2: gan.mnc<MNC>mcc<MCC>.pub.3gppnetwork.net
Option 3: gan.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org (e.g., for MNC=015, MCC=234: gan.mnc015.mcc234.pub.3gppnetwork.org)
Option 4: <MCC>-<MNC>.home.3gpp.org
Explanation: The correct derivation of a home network domain name from an IMSI involves separating the IMSI into MCC and MNC, then formatting these into a specific domain name structure. For a 3-digit MNC, this results in gan.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org, crucial for identifying and connecting to the home network correctly.