Question: What is the primary function of the Service-Specific-Type AVP (AVP Code 1257) in Diameter charging applications?
Option 1: To identify the Serving Node in a network, such as an MME.
Option 2: To specify the type of User Equipment (UE) initiating a service request.
Option 3: To indicate the type of Service-Specific-Data being transmitted or requested.
Option 4: To authenticate Diameter messages between different network nodes.
Explanation: The correct answer is Option 3 because the Service-Specific-Type AVP is designed to hold the type of the Service-Specific-Data, providing clarity on the nature or category of service-specific data being handled for proper billing and service management in telecommunications networks.