Section: 4.2.6 Service-based interfaces
Content: The 5G System Architecture contains the following service-based interfaces: Namf: Service-based interface exhibited by AMF. Nsmf: Service-based interface exhibited by SMF. Nnef: Service-based interface exhibited by NEF. Npcf: Service-based interface exhibited by PCF. Nudm: Service-based interface exhibited by UDM. Naf: Service-based interface exhibited by AF. Nnrf: Service-based interface exhibited by NRF. Nnsacf: Service-based interface exhibited by NSACF. Nnssaaf: Service-based interface exhibited by NSSAAF. Nnssf: Service-based interface exhibited by NSSF. Nausf: Service-based interface exhibited by AUSF. Nudr: Service-based interface exhibited by UDR. Nudsf: Service-based interface exhibited by UDSF. N5g-eir: Service-based interface exhibited by 5G-EIR. Nnwdaf: Service-based interface exhibited by NWDAF. Nchf: Service-based interface exhibited by CHF. Nucmf: Service-based interface exhibited by UCMF. Ndccf: Service based interface exhibited by DCCF. Nmfaf: Service based interface exhibited by MFAF. Nadrf: Service based interface exhibited by ADRF. Naanf: Service-based interface exhibited by AANF. NOTE 1: The Service-based interface exhibited by AANF is defined in TS 33.535[ Authentication and Key Management for Applications (AKMA) based on 3GPP credentials in the 5G System (5GS) ]  [124]. N5g-ddnmf: Service-based interface exhibited by 5G DDNMF. Nmbsmf: Service-based interface exhibited by MB-SMF. Nmbsf: Service-based interface exhibited by MBSF. NOTE 2: The Service-based interfaces exhibited by MB-SMF and MBSF are defined in TS 23.247[ Architectural enhancements for 5G multicast-broadcast services ]  [129]. Ntsctsf: Service-based interface exhibited by TSCTSF. Nbsp: Service-based interface exhibited by an SBI capable Boostrapping Server Function in GBA. NOTE 2: The Service-based interfaces exhibited by an SBI capable Boostrapping Server Function are defined in TS 33.220[ Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA) ]  [140] and TS 33.223[ Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA) Push function ]  [141]. Neasdf: Service-based interface exhibited by EASDF. NOTE 3: The Service-based interfaces exhibited by EADSF is defined in TS 23.548[ 5G System Enhancements for Edge Computing; Stage 2 ]  [130]. Nupf: Service-based interface exhibited by UPF.