Question: In the context of Proximity Services (ProSe) direct communication, what does the ProSe-Source-IP-Address AVP primarily contain?
Option 1: A unique identifier for the User Equipment (UE) in the EPS context
Option 2: The IP address used by the UE as the source address for ProSe direct communication
Option 3: An OctetString representing the link layer identifier for ProSe Direct Communication
Option 4: A Diameter charging application's node IP address
Explanation: The correct answer is Option 2 because the ProSe-Source-IP-Address AVP holds the IP address that the User Equipment (UE) uses as its source address when performing direct Proximity Services (ProSe) communication, crucial for routing and managing ProSe traffic within the network.