Question: In a 5G system, what can a UE (User Equipment) or non-3GPP device discover about other entities within the same CPN (Communications Pattern Network) or PIN (Private IP Network), subject to access rights?
Option 1: Only the availability of other UEs for voice calls
Option 2: The security protocols used by other devices on the network
Option 3: Availability, reachability, capabilities, and services provided by other entities (e.g., UEs, non-3GPP devices, printers)
Option 4: The battery life of nearby UEs
Explanation: This is correct because the 5G system supports comprehensive service discovery mechanisms, including availability, capabilities (e.g., specific features or functionalities) and services (e.g., printing services) provided by other entities on both CPN and PIN, all subject to defined access rights for privacy and security.