Question: In a Public Land Mobile Network (PLMN), which of the following statements accurately describes the Short Message Service (SMS) for Mobile-Terminated/Point-to-Point (MT/PP) messages?
Option 1: SMS MT/PP is exclusively provided through the Packet Switched (PS) domain, utilizing connection-oriented services.
Option 2: The PLMN directly manages the SMS Service Centre (SMS-SC) for all message transmissions.
Option 3: Connections from the fixed network to the SMS-SC are within the scope of 3GPP specifications for SMS MT/PP.
Option 4: SMS MT/PP teleservice can be provided via both Circuit Switched (CS) and Packet Switched (PS) domains, without being a connection-oriented service.
Explanation: This is correct because the Short Message Service for MT/PP messages is not a connection-oriented service but can utilize both CS and PS domains within a PLMN for its provision, highlighting the flexibility in the network architecture for supporting SMS services.