Question: What happens when a UE's mobility management signaling request is rejected by the network due to a dedicated core network?
Option 1: The UE will automatically switch to a different core network.
Option 2: The network will send a specific error code to the UE indicating the reason for rejection.
Option 3: The UE will retry the request after a certain time period.
Option 4: The mechanism for general NAS level mobility management congestion control is followed.
Explanation: When the network rejects mobility management signaling requests due to dedicated core network, it triggers the general NAS level mobility management congestion control mechanism. This ensures that the UE and the network take necessary actions to manage the congestion and prevent further overload.