Question: In a 5G System utilizing OAuth2 protocol for authorization to access the Npcf_BDTPolicyControl API, what is the role of the NRF (Network Function Repository) in relation to an NF service consumer seeking access?
Option 1: The NRF acts as the Service Provider, offering the Npcf_BDTPolicyControl service directly to the NF service consumer.
Option 2: The NRF serves as the Authorization Server, issuing a 'token' to the NF service consumer for accessing the Npcf_BDTPolicyControl API.
Option 3: The NRF functions solely as a Service Registry, without any involvement in authorization processes for the Npcf_BDTPolicyControl API.
Option 4: The NRF is bypassed in OAuth2 authorization flows for the Npcf_BDTPolicyControl API, with authorization handled directly by the API itself.
Explanation: In the context of OAuth2 authorization for accessing the Npcf_BDTPolicyControl API in a 5G System, the NRF plays a crucial role as the Authorization Server, issuing access tokens to NF service consumers after successful authentication and authorization, enabling them to consume services offered by the Npcf_BDTPolicyControl API, ensuring secure and controlled access.