6.10 Support of Indirect Communication

6.12 Binding between an NF Service Consumer and an NF Service Resource

6.11 Detection and handling of late arriving requests

6.9 Discovering the supported communication options

6.8 SBI Message Priority Mechanism

6.6 Extensibility Mechanisms

6.7 Security Mechanisms

6.5 Support of Stateless NFs

6.4 Overload Control

6.2 Server-Initiated Communication