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AMF : Access and Mobility Management Function

SMF : Session Management Function

PCF : Policy Control Function

UDM : Unified Data Management

AUSF : Authentication Server Function

NSSF : Network Slice Selection Function

NEF : Network Exposure Function

NRF : Network Repository Function

SEPP : Security Edge Protection Proxy

UPF : User Plane Function

UDR : Unified Data Repository

CHF : Charging Function

NWDAF : Network Data Analytics Function

SMSF : SMS Function

LMF : Location Management Function

AF : Application Function

GMLC : Gateway Mobile Location Center

5G-EIR : 5G Equipment Identity Register

N3IWF : Non-3GPP Interworking Function User Plane Function UPF - User Plane Function

Routes user data, enforces QoS, and performs traffic optimization Data Management & Charging UDR - Unified Data Repository

Central storage for subscriber data (policies, profiles). CHF - Charging Function

Manages charging, billing, and usage reporting.

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