Question: In a 3GPP-compliant network, what is the primary functional requirement for nodes like MSC, SMS-GMSC, SMS-IWMSC, SGSN, and SMS Router regarding Short Message Service (SMS) handling?
Option 1: To prioritize SMS over other data services for Quality of Service (QoS)
Option 2: To facilitate routing and provide intermediate buffering for short messages
Option 3: To encrypt all SMS content for enhanced security before transmission
Option 4: To convert SMS into MMS format for compatibility with newer devices
Explanation: The correct answer reflects the core functionality these nodes must support. Routing ensures SMS reaches its intended destination, possibly traversing multiple networks or domains, while intermediate buffering handles scenarios where immediate forwarding is not possible (e.g., due to network congestion or recipient unavailability), fundamental for reliable SMS delivery in a telecom network.