Question: What is the relationship between a subscriber's Mobility Management (MM) state and their Packet Data Protocol (PDP) contexts in a GPRS network?
Option 1: A change in MM state automatically triggers a change in all associated PDP contexts.
Option 2: The number of PDP contexts determines the MM state for a subscriber.
Option 3: The MM state is independent of the number and state of PDP contexts for that subscriber.
Option 4: A subscriber can only have PDP contexts when in the READY (A/Gb mode) or PMM-CONNECTED (Iu mode) MM state.
Explanation: In GPRS networks, Mobility Management (MM) states relate to mobility management functionality and allocated information. The MM state is concerned with managing subscriber mobility and does not directly influence or depend on Packet Data Protocol (PDP) contexts, which are related to data sessions. Thus, a subscriber's MM state can be independent of their PDP context status, allowing for various PDP contexts to exist across different MM states without direct dependency.