Question: What is the primary function of the Security Edge Protection Proxy (SEPP) in the 5G System architecture?
Option 1: To protect user data privacy
Option 2: To enforce inter-PLMN security on control plane messages at the perimeter of the PLMN
Option 3: To manage session establishment and modification
Option 4: To optimize network resource allocation
Explanation: The SEPP is introduced in the 5G System architecture to protect control plane messages by enforcing inter-PLMN security at the perimeter of the PLMN, specifically on the N32 interface. This ensures that control plane messages are secure and protected from potential threats when exchanged between different Public Land Mobile Networks (PLMNs).