NEF: Network Exposure Function

NEF — API Gateway to 5GC

The Network Exposure Function acts as a secure API gateway that allows external applications to access 5G core capabilities without directly connecting to internal NFs. External applications outside the operator trust domain call the NEF northbound APIs, and the NEF translates these into the appropriate internal service calls. This architecture prevents unauthorized access to core NFs while enabling powerful third-party integrations. The NEF enforces authentication, authorization, throttling, and rate limiting on every external request, ensuring the core network is protected from abuse while…