Question: What does the Reference-ID-Validity-Time Attribute Value Pair (AVP) indicate in the context of Home Subscriber Server (HSS) diameter interfaces?
Option 1: The frequency at which a User Equipment (UE) should send periodic location updates to the network.
Option 2: The maximum number of concurrent sessions allowed for a subscriber on the packet data network.
Option 3: The point in time when Charging Policy (CP) sets associated with an SCEF-Reference-ID and SCEF-ID become invalid and should be deleted.
Option 4: The duration for which a network resource is reserved for a pending session establishment.
Explanation: This AVP specifies when associated Charging Policy sets become invalid and should be deleted, highlighting its role in managing policy validity periods in telecom networks. The other options are incorrect as they relate to unrelated concepts (location updates, concurrent sessions, and resource reservation durations).