Which of the following descriptions of the NSH business chain is wrong?

The network that carries NSH packets must be a VXLAN network

Through the metadata carried in NSH packets, the packets can be parsed on NSH-Aware SF without encapsulation or decapsulation operations to know the information of the packet tape, which improves the efficiency of packet parsing and improves the forwarding performance

NSH-Unaware SF does not recognize NSH packets and discards them upon receipt

SFC Proxy receives packets from SFR on behalf of SFF and its associated NSH-Unaware representatives, deletes the NSH encapsulation information, and sends packets to through local logical components NSH-Unaware SF