Question: What are the three types of traffic forwarding methods allowed for 5G VN communication?
Option 1: Only N6-based and Local switch
Option 2: Only N19-based and N6-based
Option 3: N6-based, N19-based, and Local switch
Option 4: None of the above
Explanation: According to the text, there are three types of traffic forwarding methods allowed for 5G VN communication: N6-based, where the UL/DL traffic is forwarded to/from the DN; N19-based, where the UL/DL traffic is forwarded between PSA UPFs via N19; and Local switch, where traffic is locally forwarded by a single UPF.