Question: What is the primary purpose of GTP-C messages in the Evolved Packet System (EPS)?
Option 1: To manage user plane tunnels and transport T-PDUs.
Option 2: To provide security and authentication for control plane messages.
Option 3: To manage control plane path, tunnel, and mobility management.
Option 4: To handle billing and charging for packet data services.
Explanation: GTP-C messages are used to manage the control plane aspects of the Evolved Packet System (EPS), including path management, tunnel management, and mobility management. This is essential for maintaining connectivity and ensuring seamless communication between network nodes and User Equipment (UE).