A. The party with the larger transmission address acts as the active party and initiates the establishment of TCP connection.

B. After the TCP connection is successfully established, the active party sends an initialization message to negotiate the parameters related to the LDP session.

C. The Hello message discovered by the LDP neighbor uses TCP packets. The destination address is the multicast address 224.0.0.2.

D. After both parties receive the Keepalive message from the peer, the LDP session is established successfully.