Question: In a mobile network, which entities are involved in handling mobile originating short message transfer and notification of available memory for receiving short messages?
Option 1: SMC-GP (SGSN), SMC-EP (MSC/MME), and SMC-5G (SMSF)
Option 2: Only SMC-GP (SGSN) for all scenarios
Option 3: SMC-EP (MSC) exclusively for 2G/3G networks, with no involvement of SGSN or SMSF
Option 4: MME alone for LTE and 5G networks, without the need for SGSN or MSC
Explanation: This is correct because multiple entities are involved across different network architectures: SMC-GP in SGSN handles operations in GPRS networks; SMC-EP in MSC or MME is responsible for circuit-switched and LTE networks, respectively; and SMC-5G in SMSF caters to 5G networks, ensuring comprehensive coverage across various mobile network generations.