Question: In an NB-IoT network, after a successful authentication and integrity setup during the attachment process, what information does the NB-SS send to the UE along with the AttachAccept message, as part of the registration procedure?
Option 1: Only TAI (Tracking Area Identity) with MCC/MNC/LAC
Option 2: Both TAI (MCC/MNC/TAC) and GUTI (Globally Unique Temporary Identifier)
Option 3: Just GUTI (Globally Unique Temporary Identifier) without TAC in the TAI
Option 4: Neither TAI nor GUTI, only a generic AttachAccept acknowledgement
Explanation: During the attachment process in an NB-IoT network, after successful authentication and integrity setup, the Network (NB-SS) sends an AttachAccept message to the User Equipment (UE). This message typically includes both the Tracking Area Identity (TAI), which comprises the Mobile Country Code (MCC), Mobile Network Code (MNC), and Tracking Area Code (TAC), and the Globally Unique Temporary Identifier (GUTI) to securely identify and manage the UE's connection within the network. The inclusion of both TAI with detailed MCC/MNC/TAC and GUTI ensures precise location tracking and secure, unique identification of the UE for subsequent communications.