Question: What is the format of the default HA-APN Operator Identifier derived from the IMSI, according to 3GPP specifications?
Option 1: ha-apn.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org
Option 2: mnc<MNC>.mcc<MCC>.ha-apn.pub.3gppnetwork.org
Option 3: mcc<MCC>.mnc<MNC>.ha-apn.pub.3gppnetwork.org
Option 4: pub.3gppnetwork.org.mnc<MNC>.mcc<MCC>.ha-apn
Explanation: According to the 3GPP specifications, the default HA-APN Operator Identifier is derived from the IMSI as follows: "ha-apn.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org". This format ensures that the MNC and MCC are uniquely identified in the domain name.