Question: What is the primary source from which the Mobility Node (MN) receives the User Equipment (UE) security capabilities?
Option 1: From the UE directly during the initial attach procedure.
Option 2: From the Access and Mobility Management Function (AMF) or the previous Next Generation Radio Access Network (NG-RAN) node.
Option 3: From the Serving Node (SN) as part of the SN Addition/Modification Request Acknowledge message.
Option 4: From a combination of sources including the UE, AMF, and NG-RAN nodes.
Explanation: The Mobility Node (MN) receives the User Equipment (UE) security capabilities from the Access and Mobility Management Function (AMF) or the previous Next Generation Radio Access Network (NG-RAN) node. This is crucial for the negotiation of security algorithms between the UE and the network, ensuring that both parties agree on the security protocols to be used for communication.