Question: What security protocols are required to be implemented on N3 reference point to protect user plane data from UE to UPF?
Option 1: TLS and DTLS
Option 2: IPsec ESP and IKEv2 PSK-based authentication
Option 3: IPsec ESP and IKEv2 certificate-based authentication
Option 4: PGP and S/MIME
Explanation: To protect the traffic on the N3 reference point, it is required to implement IPsec ESP and IKEv2 certificate-based authentication. This ensures integrity, confidentiality, and replay protection of user data transmitted over N3.