Editing My 3GPP 23.501 Notes (section)

== § 4.2.2 Network Functions and entities ==
The 5G System architecture consists of the following network functions (NF):
* Authentication Server Function (AUSF).
* Access and Mobility Management Function (AMF).
* Data Network (DN), e.g. operator services, Internet access or 3rd party services.
* Unstructured Data Storage Function (UDSF).
* Network Exposure Function (NEF).
* Network Repository Function (NRF).
* Network Slice Admission Control Function (NSACF).
* Network Slice-specific and SNPN Authentication and Authorization Function (NSSAAF).
* Network Slice Selection Function (NSSF).
* Policy Control Function (PCF).
* Session Management Function (SMF).
* Unified Data Management (UDM).
* Unified Data Repository (UDR).
* User Plane Function (UPF).
* UE radio Capability Management Function (UCMF).
* Application Function (AF).
* User Equipment (UE).
* (Radio) Access Network ((R)AN).
* 5G-Equipment Identity Register (5G-EIR).
* Network Data Analytics Function (NWDAF).
* CHarging Function (CHF).
* Time Sensitive Networking AF (TSN AF).
* Time Sensitive Communication and Time Synchronization Function (TSCTSF).
* Data Collection Coordination Function (DCCF).
* Analytics Data Repository Function (ADRF).
* Messaging Framework Adaptor Function (MFAF).
* Non-Seamless WLAN Offload Function (NSWOF).
:NOTE: The functionalities provided by DCCF and/or ADRF can also be hosted by an NWDAF.
* Edge Application Server Discovery Function (EASDF).

The 5G System architecture also comprises the following network entities:
* Service Communication Proxy (SCP).
* Security Edge Protection Proxy (SEPP).

The functional descriptions of these Network Functions and entities are specified in clause 6.
* Non-3GPP InterWorking Function (N3IWF).
* Trusted Non-3GPP Gateway Function (TNGF).
* Wireline Access Gateway Function (W-AGF).
* Trusted WLAN Interworking Function (TWIF).