In this course the learner has covered the basic principles of the Service Based Interface and can explain in detail the services supported by the 5G Core network Functions, AMF, SMF, NSSF, NEF, NRF..... They will also be able to explain the concepts behind the Charging and Service support Functions, BSF, SMSF, NWDAF and CHF. They can also explain the format of the 5G URI used as part of the SBI function communications.