Question: What information can be included in the MCPTT-Identifier AVP in the context of Policy and Charging Control over Rx reference point?
Option 1: Only the UE's IP Address
Option 2: Only the name of the Mobile Network Operator
Option 3: Either a namespace value for MCPTT or the IMSI of the User Equipment (UE)
Option 4: Either one of the namespace values used for MCPTT and/or the name of the MCPTT service provider
Explanation: The correct answer is Option 4 because, according to specifications, the MCPTT-Identifier AVP can include either one of the namespace values defined for Mission-Critical Push To Talk (MCPTT) and it may also include the name of the MCPTT service provider, highlighting flexibility in the AVP's content to accommodate both namespace values and service provider identification for MCPTT services.