Question: What is the primary function of the Security Edge Protection Proxy (SEPP) in the 5G System?
Option 1: To duplicate Service Authorization applied by Service Producers.
Option 2: To filter and police messages on intra-PLMN control plane interfaces.
Option 3: To provide topology hiding for Service Consumers only.
Option 4: To apply message filtering, policing, and topology hiding to every Control Plane message in inter-PLMN signalling.
Explanation: The SEPP is a non-transparent proxy that supports message filtering, policing, and topology hiding on inter-PLMN control plane interfaces. It protects the connection between Service Consumers and Service Producers from a security perspective, without duplicating Service Authorization applied by Service Producers.