Question: What is the primary residence location for USIM (User Service Identity Module) and ISIM (IM Services Identity Module) applications in a telecommunications network?
Option 1: Embedded within the User Equipment's (UE) motherboard
Option 2: Stored on the Subscriber Identity Module (SIM) card only
Option 3: Deployed as software on the Network Operator's servers
Option 4: Residing on a Universal Integrated Circuit Card (UICC)
Explanation: In telecommunications, the UICC serves as a secure, tamper-proof environment for storing sensitive applications and data. The USIM and ISIM, being critical for service identity and authentication, are specifically designed to reside on the UICC, leveraging its security features to protect user and service-related information. This setup ensures seamless and secure communication between the User Equipment (UE) and the network operator's infrastructure.