Question: In the context of Wireless and Wireline Convergence Access Support for the 5G System, what is the primary purpose of extending Nbsf_Management_Register/Deregister and Discovery service operations as defined in TS 23.502?
Option 1: To facilitate the handover of User Equipment (UE) between different Radio Access Technologies (RATs).
Option 2: To enhance security for PDU sessions by encrypting IPv6 addresses.
Option 3: To enable registration/deregistration and discovery of binding information for PDU sessions with specific IPv6 address or prefix assignments (e.g., /128 IPv6 address or UE IPv6 prefix shorter than /64).
Option 4: To optimize network resource allocation for IoT devices connected via the 5G System.
Explanation: The correct answer, Option 3, highlights the extension's purpose to manage (register/deregister and discover) binding information specifically for PDU sessions that are assigned unique IPv6 configurations, such as a single /128 IPv6 address or prefixes shorter than /64. This is crucial for efficient network operation, especially in scenarios requiring precise management of IP resources. The other options, while related to telecom concepts, do not accurately describe the primary purpose of extending these service operations in this context.